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Standards and calculation coverage

Available calculations, their recorded basis, and the scope of each reference.

A standard can cover more classes, sizes, gauges and interface details than a particular calculator. The recorded edition below identifies the available calculation basis; a linked later edition is not automatically adopted.

General purpose

Unified inch

UN, UNR and UNJ forms with coarse, fine, extra-fine, constant-pitch and special series.

Recorded basis: ASME B1.1-2003; SAE AS8879C-2003

Sources and scope
  • ASME B1.1 · 2003 — Recorded UN/UNR calculation edition; publisher preview is not the full specification.
  • SAE AS8879C · 2003 — UNJ controlled root-radius and minor-diameter requirements.
  • Later B1.1 editions have not been adopted or recertified merely by linking their publisher records.
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ISO metric M and MJ

M/MJ metric profiles and supported independent tolerance grades/positions.

Recorded basis: M: ASME B1.13M-2005 / ISO 965:1998; MJ: ASME B1.21M-1997 / ISO 5855:1988

Sources and scope
  • The supported grades/positions are bounded by the calculator capability catalog; this is not every ISO metric product standard.
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Unified miniature

Supported UNM miniature-size table.

Recorded basis: ASME B1.10-1958 (R1988)

Sources and scope
  • Compare the complete later B1.10M specification before claiming adoption.
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Whitworth BSW / BSF

55-degree Whitworth dimensions and supported fit/engagement calculations.

Recorded basis: BS 84:1956

Sources and scope
  • BS 84 · 1956 — Historical parallel Whitworth-form thread specification.
  • Add named size-series presets and explicit BSW/BSF designation mapping.
  • The linked historical BSI document is withdrawn; its recorded calculation basis is retained.
Qualified scopeCalculate

British Association

Supported BA numerical sizes and normal/close fit options.

Recorded basis: Attribution remains qualified; see the source notes.

Sources and scope
  • BS 93 · 2008 — BA specification; related reference rather than verified source of every existing row.
  • Establish the catalog source edition and compare the complete BS 93 requirements.
Qualified scopeCalculate

Power threads

Acme, Stub and centralizing

29-degree general-purpose, centralizing and Stub Acme calculations.

Recorded basis: ASME B1.5-1997; Stub Acme table edition unconfirmed

Sources and scope
  • ASME B1.5 · 1997 — General-purpose and centralizing Acme requirements.
  • ASME B1.8 · 1988 — Separate Stub Acme requirements; exact historical table attribution still needs confirmation.
  • Pin the exact B1.8 edition behind the retained Stub data.
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Inch buttress

Asymmetric 7-degree / 45-degree inch buttress calculations.

Recorded basis: ASME B1.9-1973 (R1992)

Sources and scope
Available scopeCalculate

ISO metric trapezoidal

30-degree metric trapezoidal profile and supported tolerance selections.

Recorded basis: ISO 2901:1993 recorded; companion table editions not individually established

Sources and scope
  • Confirm the editions of companion size/tolerance tables before claiming a newer ISO 2901–2904 adoption.
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Metric buttress

Asymmetric 3-degree / 30-degree metric buttress calculations.

Recorded basis: DIN 513 series:1985

Sources and scope
  • 2020-12 DIN 513 editions require an explicit change review; existing calculations retain 1985 basis.
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Pipe

NPT tapered pipe

Supported finite inch pipe size/limit catalog.

Recorded basis: ASME B1.20.1-1983 (R2001)

Sources and scope
  • ASME B1.20.1 · 2013 (R2018) — General-purpose inch pipe threads; current publisher record differs from the historical calculation edition.
  • Later B1.20.1 edition comparison is not complete.
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NPSM straight mechanical pipe

Supported finite inch pipe size/limit catalog.

Recorded basis: ASME B1.20.1-1983 (R2001)

Sources and scope
  • ASME B1.20.1 · 2013 (R2018) — General-purpose inch pipe threads; current publisher record differs from the historical calculation edition.
  • Later B1.20.1 edition comparison is not complete.
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NPSL locknut pipe

Supported finite inch pipe size/limit catalog.

Recorded basis: ASME B1.20.1-1983 (R2001)

Sources and scope
  • ASME B1.20.1 · 2013 (R2018) — General-purpose inch pipe threads; current publisher record differs from the historical calculation edition.
  • Later B1.20.1 edition comparison is not complete.
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NPTF dryseal pipe

Supported dryseal size table and available crest/root limits.

Recorded basis: Attribution remains qualified; see the source notes.

Sources and scope
  • Identify class 1/class 2 and the precise adopted B1.20.3 edition.
  • NPSF, NPSI and PTF-SAE Short are separate missing variants; they are not implied by this catalog.
Qualified scopeCalculate

BSPT jointing pipe

Supported tapered pipe dimensions and gauge lengths.

Recorded basis: ISO 7-1:1994

Sources and scope
  • ISO 7-1 · 1994 — R, Rp and Rc pipe-thread dimensions, tolerances and designation.
  • Do not infer a separately supported parallel internal Rp class from the BSPT name.
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BSPP parallel pipe

Supported 55-degree parallel pipe-size catalog.

Recorded basis: Attribution remains qualified; see the source notes.

Sources and scope
  • ISO 228-1 · 2000 — Parallel G pipe-thread requirements; G and Rp are not interchangeable tolerance designations.
  • ISO 7-1 · 1994 — R, Rp and Rc pipe-thread dimensions, tolerances and designation.
  • Separate and verify G class A/B and Rp catalogs instead of treating every parallel pipe thread as interchangeable.
Qualified scopeCalculate

NPSC · H28 (1957)

Sections VII and VIII: historical NPSC, NPTR, PTF-SAE SHORT, NPSF and NPSI product dimensions, profile limits and applicable gauges. This is the inspected 1959 issue of the 1957 edition, not a later ASME standard.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • Internal straight-thread pitch/minor limits and historical taper-plug inspection data. External mate, a complete major-diameter band, exact crest/root radius, joint pressure rating and complete fitting geometry are not supplied by VII.4.
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NPTR · H28 (1957)

Sections VII and VIII: historical NPSC, NPTR, PTF-SAE SHORT, NPSF and NPSI product dimensions, profile limits and applicable gauges. This is the inspected 1959 issue of the 1957 edition, not a later ASME standard.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • Shortened external end-plane pitch diameter, axial lengths, fitting-recess limits, NPT gauge basics and directional gauge tolerances. Pipe stock outside diameter is not a finished major-diameter limit; internal thread diameter bands and a unique rounded surface are not inferred.
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PTF-SAE SHORT · H28 (1957)

Sections VII and VIII: historical NPSC, NPTR, PTF-SAE SHORT, NPSF and NPSI product dimensions, profile limits and applicable gauges. This is the inspected 1959 issue of the 1957 edition, not a later ASME standard.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • Separate basic external E0-short and internal E1-short planes, actual product lengths, profile truncation bounds and all three historical gauging methods. Independent planes are not overlaid, source reference-only larger gauge rows remain qualified, and a unique full 3D or corner-radius construction is not inferred.
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NPSF · H28 (1957)

Sections VII and VIII: historical NPSC, NPTR, PTF-SAE SHORT, NPSF and NPSI product dimensions, profile limits and applicable gauges. This is the inspected 1959 issue of the 1957 edition, not a later ASME standard.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • Seven published internal-only product sizes with pitch/minor limits, design full-thread minimum, profile truncation boundaries and appropriate historical taper-plug gauges. There is no external NPSF product, no generic independent maximum minor/major diameter and no pressure rating derived here.
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NPSI · H28 (1957)

Sections VII and VIII: historical NPSC, NPTR, PTF-SAE SHORT, NPSF and NPSI product dimensions, profile limits and applicable gauges. This is the inspected 1959 issue of the 1957 edition, not a later ASME standard.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • Seven published internal-only product sizes with pitch/minor limits, design full-thread minimum, profile truncation boundaries and NPSI L1 taper-plug gauges. No external NPSI product or undefined complete minor/major diameter band is synthesized.
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F-PTF Dryseal fine-pitch — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • Source-defined Dryseal60° form and 1:16 diameter taper, with independent external/internal end planes. Dedicated fine-pitch gauges are not tabulated.
Available scopeCalculate

PTF-SPL SHORT — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • Unchanged SAE-short small-external/large-internal planes; reduced full lengths. L₂-ring/L₃-plug length/taper checks are explicitly unavailable.
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PTF-SPL EXTRA SHORT — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • Unchanged SAE-short small-external/large-internal planes; reduced full lengths. L₂-ring/L₃-plug length/taper checks are explicitly unavailable.
Available scopeCalculate

Steel-drum plug and flange — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • American Standard cylindrical60° pipe-thread form; finite paired product bounds with one-sided major/minor callouts.
Available scopeCalculate

Threaded steel-flange pipe extensions — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • Additional small-end projection through a standard pipe ring gauge; existing basic thread form. No unlisted diameter is inferred.
Available scopeCalculate

Conduit

Pg conduit

80-degree Pg conduit profile and finite sizes.

Recorded basis: DIN 40430:1971-02

Sources and scope
Available scopeCalculate

Rigid-steel conduit taper threads — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • American Standard60° form with 1:16 diameter taper. Source E₀ external beginning plane and NPT inspection gauges remain separate.
Available scopeCalculate

Rigid-steel conduit running threads — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • Cylindrical60° American Standard form; source provides pitch-diameter bounds only, with separate bushing/fitting and locknut interfaces.
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Inserts

Inch insert-tapping threads

Supported internal tapped-hole dimensions for helical-coil inserts.

Recorded basis: Attribution remains qualified; see the source notes.

Sources and scope
  • ASME B18.29.1 — Related insert, tapped-hole and STI tap requirements; adopted numerical source edition unconfirmed.
  • Establish numerical source edition and supplier applicability for all rows.
Qualified scopeCalculate

Metric insert-tapping threads

Supported internal tapped-hole dimensions for helical-coil inserts.

Recorded basis: Attribution remains qualified; see the source notes.

Sources and scope
  • ASME B18.29.2M — Related insert, tapped-hole and STI tap requirements; adopted numerical source edition unconfirmed.
  • Establish numerical source edition and supplier applicability for all rows.
Qualified scopeCalculate

Container finishes

SPI/SP-415 plastic neck finishes

Neck finish SP415; drawing 1165381-1.

Recorded basis: 1165381-1 revision 1, 1999-03-10

Sources and scope
  • Cap, liner and sealing-system geometry is outside the neck-finish drawing scope.
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SPI/SP-410 plastic neck finishes

Neck finish SP410; drawing 1165380-1.

Recorded basis: 1165380-1 revision 1, 1999-03-10

Sources and scope
  • Cap, liner and sealing-system geometry is outside the neck-finish drawing scope.
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SPI/SP-400 plastic neck finishes

Neck finish SP400; drawing 1165379-1.

Recorded basis: 1165379-1 revision 1, 1999-03-10

Sources and scope
  • Cap, liner and sealing-system geometry is outside the neck-finish drawing scope.
Available scopeCalculate

PCF - 48P - 5 Voluntary Guideline Hot Fill Finish

PCF-48P-5, PCF-48P-5. Published three-start hot-fill dimensions with the inconsistent locating-dot spacing note retained. Manufacturer bore data and unspecified lower/cutter geometry prevent a unique complete CAD surface.

Recorded basis: ISBT drawing 1165378-1, revision 001 (2000-01-17)

Sources and scope
  • ISBT 1165378-1 · revision 001 (2000-01-17) — PCF-48P-5 neck finish, drawing 1165378-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published three-start hot-fill dimensions with the inconsistent locating-dot spacing note retained. Manufacturer bore data and unspecified lower/cutter geometry prevent a unique complete CAD surface.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • Nominal C and I vary by manufacturer. As on PCF-48P-4, THREE locating dots 180° apart is inconsistent source text and is not used to infer actual mark placement.
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PCF - 48P - 4 Voluntary Guideline Hot Fill Finish

PCF-48P-4, PCF-48P-4. Published three-start hot-fill neck/thread/sealing/tamper dimensions with source phase/overlap data. Manufacturer bore data, inconsistent locating-dot spacing text and unspecified lower/cutter surfaces prevent a unique complete CAD reconstruction.

Recorded basis: ISBT drawing 1127626-1, revision 001 (2000-01-17)

Sources and scope
  • ISBT 1127626-1 · revision 001 (2000-01-17) — PCF-48P-4 neck finish, drawing 1127626-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published three-start hot-fill neck/thread/sealing/tamper dimensions with source phase/overlap data. Manufacturer bore data, inconsistent locating-dot spacing text and unspecified lower/cutter surfaces prevent a unique complete CAD reconstruction.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • Nominal C and I vary by manufacturer. The source’s locating-dot text inconsistently says THREE dots 180° apart; that angular statement cannot define three equally spaced marks and is not used to infer a contour or start count.
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PCF - 48P - 3 Voluntary Guideline Hot Fill Finish

PCF-48P-3, PCF-48P-3. Published plastic hot-fill neck/thread/tamper dimensions, three-start development and view-specific start positions. I, complete lower/support surfaces and exact cutter lead-in/runout remain unspecified.

Recorded basis: ISBT drawing 1127628-1, revision 001 (2000-01-17)

Sources and scope
  • ISBT 1127628-1 · revision 001 (2000-01-17) — PCF-48P-3 neck finish, drawing 1127628-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published plastic hot-fill neck/thread/tamper dimensions, three-start development and view-specific start positions. I, complete lower/support surfaces and exact cutter lead-in/runout remain unspecified.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • I is manufacturer-defined and has no numeric value. Three locating dots 120° apart are required on the support ledge; optional dot designs and stepped B are accepted.
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PCF - 48P - 2 Voluntary Guideline Hot Fill Finish

PCF-48P-2, PCF-48P-2. Dimensioned plastic hot-fill neck/thread/sealing/tamper data and 540° single-start development, with manufacturer I and lower/cutter geometry unspecified. Locating-dot count does not define start count.

Recorded basis: ISBT drawing 1127627-1, revision 001 (2000-01-17)

Sources and scope
  • ISBT 1127627-1 · revision 001 (2000-01-17) — PCF-48P-2 neck finish, drawing 1127627-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Dimensioned plastic hot-fill neck/thread/sealing/tamper data and 540° single-start development, with manufacturer I and lower/cutter geometry unspecified. Locating-dot count does not define start count.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • I is manufacturer-defined and has no numeric value; C is the separately controlled inside sealing diameter. Optional stepped B is shown for weight reduction.
Available scopeCalculate

PCF - 43P - 1 Voluntary Guideline Hot Fill Finish

PCF-43P-1, PCF-43P-1. Detailed source neck/thread/sealing/tamper dimensions and two-start development; overview start-count conflict is retained explicitly. Manufacturer-defined bore data and unspecified lower/cutter contours prevent a unique complete CAD surface.

Recorded basis: ISBT drawing 1127625-1, revision 001 (2000-01-17)

Sources and scope
  • ISBT 1127625-1 · revision 001 (2000-01-17) — PCF-43P-1 neck finish, drawing 1127625-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Detailed source neck/thread/sealing/tamper dimensions and two-start development; overview start-count conflict is retained explicitly. Manufacturer-defined bore data and unspecified lower/cutter contours prevent a unique complete CAD surface.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • The detailed 1127625-1 drawing explicitly specifies TWO right-hand starts 180° apart, 144° full-depth thread per start, a 54° start position, 3.5 TPI per start and 7.26 mm [.286 in] travel per turn. The overview hot-fill chart inconsistently lists one start; this catalog follows the detailed drawing and flags that conflict.
  • No numeric P-between-starts is supplied. Nominal C and I are manufacturer-specific; the separately printed I minimum remains conditional under note 6.
Available scopeCalculate

PCO - 38 Voluntary Finish 38mm CSD Finish

PCO 38, PCO-38. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165371-1, revision 001 (2000-10-19)

Sources and scope
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
Available scopeCalculate

PCF - 38P - 5 Voluntary Guideline Non-Carbonated beverage finish (extrusion blown)

PCF-38P-5 · extrusion blown, PCF-38P-5. Extrusion-blown neck/thread/top-seal/ratchet numeric callouts and single-start travel data. Deflecting seal behavior, complete 3D ratchet/cutter contours and lower bottle geometry are not inferred.

Recorded basis: ISBT drawing 1165377-1, revision 001 (2000-11-21)

Sources and scope
  • ISBT 1165377-1 · revision 001 (2000-11-21) — PCF-38P-5 · extrusion blown neck finish, drawing 1165377-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Extrusion-blown neck/thread/top-seal/ratchet numeric callouts and single-start travel data. Deflecting seal behavior, complete 3D ratchet/cutter contours and lower bottle geometry are not inferred.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • T and E are averages of two measurements across the major and minor axes. I varies by manufacturer under note 5.
Available scopeCalculate

PCF - 38P - 4 Voluntary Guideline Hot Fill Finish

PCF-38P-4, PCF-38P-4. Published top-seal neck/thread/tamper dimensions and development data, with manufacturer-defined I and unspecified lower/support contours. Phase-specific K values are not merged and no complete CAD surface is inferred.

Recorded basis: ISBT drawing 1127624-1, revision 001 (1999-12-10)

Sources and scope
  • ISBT 1127624-1 · revision 001 (1999-12-10) — PCF-38P-4 neck finish, drawing 1127624-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published top-seal neck/thread/tamper dimensions and development data, with manufacturer-defined I and unspecified lower/support contours. Phase-specific K values are not merged and no complete CAD surface is inferred.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • I varies by manufacturer and is not numerically specified. C is the separately controlled inside sealing diameter; it is not substituted for the undefined I opening datum.
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PCF - 38G - 3 Voluntary Guideline Hot Fill Finish

PCF-38G-3 · glass, PCF-38G-3. Glass-finish neck, thread, sealing and tamper-bead callouts, locating-mark/gauge data and limited 123° two-start development. Manufacturer I and complete lower/closure surfaces remain unspecified; no plastic substitution or unique full CAD surface is inferred.

Recorded basis: ISBT drawing 1127623-1, revision 001 (1999-12-10)

Sources and scope
  • ISBT 1127623-1 · revision 001 (1999-12-10) — PCF-38G-3 · glass neck finish, drawing 1127623-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Glass-finish neck, thread, sealing and tamper-bead callouts, locating-mark/gauge data and limited 123° two-start development. Manufacturer I and complete lower/closure surfaces remain unspecified; no plastic substitution or unique full CAD surface is inferred.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • No E/F overhang is allowed through 360°. Manufacturer-defined I is not supplied numerically.
Available scopeCalculate

PCF - 38P - 2 Voluntary Guideline Hot Fill Finish

PCF-38P-2, PCF-38P-2. Published top-seal neck/thread/tamper dimensions and development data, with manufacturer-defined I and unspecified lower/support contours. Phase-specific K values are not merged and no complete CAD surface is inferred.

Recorded basis: ISBT drawing 1127622-1, revision 001 (1999-12-10)

Sources and scope
  • ISBT 1127622-1 · revision 001 (1999-12-10) — PCF-38P-2 neck finish, drawing 1127622-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published top-seal neck/thread/tamper dimensions and development data, with manufacturer-defined I and unspecified lower/support contours. Phase-specific K values are not merged and no complete CAD surface is inferred.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • I varies by manufacturer and is not numerically specified. C is the separately controlled inside sealing diameter; it is not substituted for the undefined I opening datum.
Available scopeCalculate

PCF - 38P - 1 Voluntary Guideline Hot Fill Finish

PCF-38P-1, PCF-38P-1. Source-controlled neck/thread/sealing/tamper dimensions, section-specific gauge heights and two-start development data. Nominal C is manufacturer-defined, lower geometry is partly unspecified and cutter-profile lead-in/runout is not fully supplied; no unique complete CAD surface is inferred.

Recorded basis: ISBT drawing 1127621-1, revision 001 (1999-12-10)

Sources and scope
  • ISBT 1127621-1 · revision 001 (1999-12-10) — PCF-38P-1 neck finish, drawing 1127621-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Source-controlled neck/thread/sealing/tamper dimensions, section-specific gauge heights and two-start development data. Nominal C is manufacturer-defined, lower geometry is partly unspecified and cutter-profile lead-in/runout is not fully supplied; no unique complete CAD surface is inferred.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • The manufacturer defines nominal C and may vary I. The printed I minimum and C tolerance do not provide a complete inside sealing surface or a mating-cap bore.
Available scopeCalculate

Alcoa - 1690 Voluntary Guideline 38mm CSD finish

Alcoa 1690, ALCOA 969-1690-003. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165374-3, revision 003 (2002-06-21)

Sources and scope
  • ISBT 1165374-3 · revision 003 (2002-06-21) — Alcoa 1690 neck finish, drawing 1165374-3: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • Pressure top and side seal finish; the bore C diameter is preferred, not a controlled inside-bore seal specification.
  • Run-out follows a horizontal plane (0° helix), not the 1°37′ working-thread helix, and must not exceed source J. J is a symbol on the development; no separate numeric J value is printed.
Available scopeCalculate

PCF - 33P - 1 Voluntary Guideline Hot Fill Finish

PCF-33P-1, PCF-33P-1. Published plastic hot-fill neck/thread/sealing/tamper data and two-start development. I and complete lower/support surfaces remain manufacturer-specific or unspecified; no full CAD surface is inferred.

Recorded basis: ISBT drawing 1127619-1, revision 001 (1999-12-10)

Sources and scope
  • ISBT 1127619-1 · revision 001 (1999-12-10) — PCF-33P-1 neck finish, drawing 1127619-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published plastic hot-fill neck/thread/sealing/tamper data and two-start development. I and complete lower/support surfaces remain manufacturer-specific or unspecified; no full CAD surface is inferred.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • I varies by manufacturer and has no numeric value in this source. C is separately controlled and is not substituted for I.
Available scopeCalculate

PCO - 1881 Voluntary Guideline 28mm CSD finish

PCO 1881, PCO-1881-1. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 3784253-21, dated 2007-02-14; revision not separately stated

Sources and scope
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
Available scopeCalculate

PCO - 1823 Voluntary Guideline 28mm CSD finish

PCO 1823, PCO 969-1823-002. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165367-2, revision 002 (1998-05-29)

Sources and scope
  • ISBT 1165367-2 · revision 002 (1998-05-29) — PCO 1823 neck finish, drawing 1165367-2: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
Available scopeCalculate

PCO - 1820 Voluntary Guideline 28mm CSD finish

PCO 1820, PCO 969-1820-001. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165366-1, revision 001 (1998-05-29)

Sources and scope
  • ISBT 1165366-1 · revision 001 (1998-05-29) — PCO 1820 neck finish, drawing 1165366-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
Available scopeCalculate

PCO - 1817 Voluntary Guideline 28mm CSD finish

PCO 1817, PCO 969-1817-001. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165365-1, revision 001 (1998-05-29)

Sources and scope
  • ISBT 1165365-1 · revision 001 (1998-05-29) — PCO 1817 neck finish, drawing 1165365-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
Available scopeCalculate

PCO - 1816 Voluntary Guideline 28mm CSD finish

PCO 1816, PCO 969-1816-002. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165364-2, revision 002 (1998-05-29)

Sources and scope
  • ISBT 1165364-2 · revision 002 (1998-05-29) — PCO 1816 neck finish, drawing 1165364-2: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
Available scopeCalculate

PCO - 1815 Voluntary Guideline 28mm CSD finish

PCO 1815, PCO 969-1815-002. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165363-2, revision 002 (1998-05-29)

Sources and scope
  • ISBT 1165363-2 · revision 002 (1998-05-29) — PCO 1815 neck finish, drawing 1165363-2: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
Available scopeCalculate

PCO - 1810 Voluntary Guideline 28mm CSD finish

PCO 1810, PCO 969-1810-002. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165362-2, revision 002 (2003-04-21)

Sources and scope
  • ISBT 1165362-2 · revision 002 (2003-04-21) — PCO 1810 neck finish, drawing 1165362-2: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
Available scopeCalculate

Obrist - 28 (19mm) Voluntary Guideline Flatwater Finish

Obrist 28 (19 mm), OBRIST-28 (19mm). Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165375-2, revision 002 (1999-10-29)

Sources and scope
  • ISBT 1165375-2 · revision 002 (1999-10-29) — Obrist 28 (19 mm) neck finish, drawing 1165375-2: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
Available scopeCalculate

BPF-C Voluntary Guideline 28mm CSD finish

BPF-C, 0001BPF-008. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165369-8, revision 008 (2000-10-19)

Sources and scope
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • The source imperial S tolerance .040 in and nominal R.20 ± .25 mm callouts are retained literally with row-level notes; do not silently reinterpret these apparent publication anomalies for tooling.
Available scopeCalculate

Alcoa - 1788 Voluntary Guideline 28mm CSD finish

Alcoa 1788, ALCOA969-1788-003. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165370-3, revision 003 (2000-05-29)

Sources and scope
  • ISBT 1165370-3 · revision 003 (2000-05-29) — Alcoa 1788 neck finish, drawing 1165370-3: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • Run-out follows a horizontal plane (0° helix), not the 2°12′ working-thread helix, and must not exceed source J. No numeric J value is printed.
Available scopeCalculate

Alcoa - 1716 Voluntary Guideline 28mm CSD finish

Alcoa 1716, ALCOA969-1716-004. Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.

Recorded basis: ISBT drawing 1165368-4, revision 004 (1999-10-29)

Sources and scope
  • ISBT 1165368-4 · revision 004 (1999-10-29) — Alcoa 1716 neck finish, drawing 1165368-4: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Published axial dimensions and thread-development extents only. Lead-in, vent-slot blends, sealing interfaces and full closure/finish CAD contours are not uniquely reconstructed from this envelope; use the source and supplier construction model for tooling.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • Run-out follows a horizontal plane (0° helix), not the 2°12′ working-thread helix, and must not exceed source J. No numeric J value is printed.
Available scopeCalculate

PCF - 26P -2 Voluntary Guideline Flatwater Finish

PCF-26P-2, PCF-26P-2. Dimensioned neck, sealing, tamper-bead and wider support-ledge callouts plus three-start development data. The source does not define geometry below the lower support ledge or the exact cutter-profile thread lead-in/runout; no complete CAD surface is inferred.

Recorded basis: ISBT drawing 2072575-1, revision 001 (2002-05-15)

Sources and scope
  • ISBT 2072575-1 · revision 001 (2002-05-15) — PCF-26P-2 neck finish, drawing 2072575-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Dimensioned neck, sealing, tamper-bead and wider support-ledge callouts plus three-start development data. The source does not define geometry below the lower support ledge or the exact cutter-profile thread lead-in/runout; no complete CAD surface is inferred.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • Three right-hand thread starts are 120° apart. Full-depth duration is 180° per lead. The development view prints 6.35 mm [.250 in] travel per turn. Its additional “2.12 TPI per lead” label conflicts with that travel and dimensioned P=2.12 mm; the inconsistent TPI label is not used as a calculation input.
Available scopeCalculate

PCF - 26P -1 Voluntary Guideline Flatwater Finish

PCF-26P-1, PCF-26P-1. Dimensioned neck, sealing, tamper-bead and support-ledge callouts plus three-start development data. The source does not define geometry below the lower support ledge or the exact cutter-profile thread lead-in/runout; no complete CAD surface is inferred.

Recorded basis: ISBT drawing 2072573-1, revision 001 (2002-05-15)

Sources and scope
  • ISBT 2072573-1 · revision 001 (2002-05-15) — PCF-26P-1 neck finish, drawing 2072573-1: independently printed metric and inch dimensions, limits, reference/basic callouts, development data and source qualifications.
  • Dimensioned neck, sealing, tamper-bead and support-ledge callouts plus three-start development data. The source does not define geometry below the lower support ledge or the exact cutter-profile thread lead-in/runout; no complete CAD surface is inferred.
  • The neck-finish source does not supply the complete mating cap, liner or supplier-specific sealing system.
  • Three right-hand thread starts are 120° apart. Full-depth duration is 180° per lead. The development view prints 6.35 mm [.250 in] travel per turn. Its additional “2.12 TPI per lead” label conflicts with that travel and dimensioned P=2.12 mm; the inconsistent TPI label is not used as a calculation input.
Available scopeCalculate

Hose

NH hose couplings · FED-STD-H28/10 (1978)

The product, engagement and gauge dimensions in tables 10.1–10.10 of the 1978 federal document. Later ASME/NFPA revisions, NHR and additional later sizes are outside this edition.

Recorded basis: FED-STD-H28/10 — National hose coupling and fire-hose coupling threads, 1978-08-31; inspected issue 1978-08-31

Sources and scope
  • The basic axial form is 60° with p/8 flats and h=0.649519p. Product minor/major root limits include virtual worn-tool intersections and source-prescribed limiting flats; they do not uniquely define actual tool radii. Pilot/entrance and blunt-start axial dimensions are retained, without inferring an entire helical start, coupling body, gasket or seal surface.
Available scopeCalculate

NPSH hose couplings · FED-STD-H28/10 (1978)

The product, engagement and gauge dimensions in tables 10.1–10.10 of the 1978 federal document. Later ASME/NFPA revisions, NHR and additional later sizes are outside this edition.

Recorded basis: FED-STD-H28/10 — National hose coupling and fire-hose coupling threads, 1978-08-31; inspected issue 1978-08-31

Sources and scope
  • The basic axial form is 60° with p/8 flats and h=0.649519p. Product minor/major root limits include virtual worn-tool intersections and source-prescribed limiting flats; they do not uniquely define actual tool radii. Pilot/entrance and blunt-start axial dimensions are retained, without inferring an entire helical start, coupling body, gasket or seal surface.
Available scopeCalculate

Specialty

Rolled lamp screw shells · H28 (1957)

Section XV, lamp-base and lamp-holder product limits, nominal rolled profiles, working/inspection and check-gauge tolerances. Historical ASA C81.1-related scope.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • Rolled circular-segment form, not a V thread. No generic included angle or current IEC lamp interface is inferred.
Available scopeCalculate

0.800–36 AMO · H28 (1957)

Section XVI, American microscope objective and nosepiece thread: profile, basic/design values, allowance, product limits, engagement and recommended gauges.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • Truncated Whitworth-derived 55° local form. The unused basic Whitworth radius is a comparison value, not an AMO crest/root radius.
Available scopeCalculate

British microscope thread · H28 (1957)

Section XVI §4 and Table XVI.4, historical British microscope objective/nosepiece thread comparison.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • Rounded 55° Whitworth basic form; not the truncated AMO design or a claim about later RMS/ISO interface editions.
Available scopeCalculate

3½–8 surveying mount · H28 (1957)

Published historical surveying-mount recommendation, Section XVII. The source says it lacked official American Standard status and records a 1958 adoption recommendation.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • American National 60° profile with its own special product limits and mounting interface; no generic Unified fit is substituted.
Available scopeCalculate

Camera tripod connections · H28 (1957)

Section XVIII §§1–2, historical PH3.6/PH3.7-related tripod screw/socket limits and interface, spacer and adapter dimensions.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • 60° Unified camera mounting threads with separately defined interface dimensions. No current ISO 1222 conformity or complete tripod construction is inferred.
Available scopeCalculate

Mounted photographic lenses · H28 (1957)

Section XVIII §3, Table XVIII.1: sixteen published mounted-lens thread sizes, historical 3A/3B limits, tolerances and shoulder-to-end length.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • 60° Unified local form and diameter limits; the table's maximum shoulder-to-end dimension does not prescribe one complete lens barrel.
Available scopeCalculate

Photographic lens accessories · H28 (1957)

Section XVIII §4, PH3.12-related basic diameters, 36-TPI pitch and axial interface dimensions, with supported American National NS-2 table limits from adopted Part I.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • Historical American National 60° profile. Full pitch-diameter bands are available only where the adopted NS-2 table supplies a value; basic diameter alone does not define a complete fit.
Available scopeCalculate

Series filter retaining rings · H28 (1957)

Section XVIII §4, Table XVIII.3, six historical filter-series retaining-ring basic diameters and shared PH3.12 pitch/interface provisions.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • Same historical 36-TPI accessory form, with each filter-series diameter retained separately. No current photographic filter-size equivalence is inferred.
Available scopeCalculate

Taper shutter cable release · H28 (1957)

Section XVIII §5, historical PH3.23-related taper cable-release tip/socket profile and individually dimensioned interfaces.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • 50-TPI American National form adapted for taper. The figures do not uniquely establish all product diameter/gauge-plane limits; no NPT or generic taper thread is substituted.
Available scopeCalculate

Straight shutter cable release · H28 (1957)

Section XVIII §6, historical PH3.24-related straight cable-release interface plus the adopted Part I No. 5–44 NF-2 product limits.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • Historical 60° American National form and finite NF-2 limits, distinct from a later Unified class assignment.
Available scopeCalculate

60° stub basic form · H28 (1957)

Section XIX §1, Table XIX.1, all ten explicitly tabulated 60° stub basic profiles and minimum-clearance rule.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • Basic 60° stub proportions only. The source requires all limits to accompany the SPECIAL FORM designation; it does not define a complete product fit.
Available scopeCalculate

10° modified square basic form · H28 (1957)

Section XIX §2 and Fig. XIX.1, source-prescribed 10° modified-square basic proportions with application-selected pitch and added radial clearance.

Recorded basis: Screw-Thread Standards for Federal Services, NBS Handbook H28 (1957), Part III, 1957, Part III; inspected issue 1960-10-07

Sources and scope
  • Relative basic proportions only. No absolute diameter, fit allowance, finished surface, mate, load rating or gauge limits are specified by this figure.
Available scopeCalculate

SPL-PTF Dryseal tubing-OD — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • Dryseal60° profile and 1:16 diameter taper. Tubing OD is not a thread major diameter or nominal pipe size.
Available scopeCalculate

Chemical-container closure — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • 60° form with .0933in radial depth and .0075in crest/root radii. No unsourced generic flat-V truncation is used.
Available scopeCalculate

Dryseal superseded automotive L₁ basis — historical

Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.

Recorded basis: NBS Handbook H28 (1957), Part II, 1957; approved 1958; inspected issue 1959-11-16

Sources and scope
  • NBS Handbook H28 (1957), Part II · 1957; approved 1958; issued 1959-11-16 — Appendix 7 historical application data: extended steel-flange threading; drum and chemical-container closures; rigid-steel conduit; Dryseal special short, extra-short, fine-pitch and tubing-OD series; and the explicitly superseded automotive gauge basis. The original appendix distinguishes published application information and design recommendations from the main approved thread series.
  • Historical reference diameters at the stated L₁ and L₁−p gauge planes; not an approved product fit.
Available scopeCalculate

Gas cylinder

NGO right-hand outlets · NBS H28 (1957)

Historical thread dimensions in section IX, with section VII requirements explicitly incorporated for NGS and NGT. Gas assignments, valve bodies, seats, nipples, washers, medical yokes and complete connection interchangeability are not inferred from a matching thread size.

Recorded basis: NBS Handbook H28 (1957), Part II — Gas-cylinder thread requirements, 1957; inspected issue 1959-11-16

Sources and scope
  • Thread-only dimensions and named reference planes. Full valve outlet/inlet bodies, seats, seals, medical yokes, start geometry and complete connection compatibility are outside this calculator scope.
Available scopeCalculate

NGO left-hand outlets · NBS H28 (1957)

Historical thread dimensions in section IX, with section VII requirements explicitly incorporated for NGS and NGT. Gas assignments, valve bodies, seats, nipples, washers, medical yokes and complete connection interchangeability are not inferred from a matching thread size.

Recorded basis: NBS Handbook H28 (1957), Part II — Gas-cylinder thread requirements, 1957; inspected issue 1959-11-16

Sources and scope
  • Thread-only dimensions and named reference planes. Full valve outlet/inlet bodies, seats, seals, medical yokes, start geometry and complete connection compatibility are outside this calculator scope.
Available scopeCalculate

NGT, chlorine NGT and SGT inlets · NBS H28 (1957)

Historical thread dimensions in section IX, with section VII requirements explicitly incorporated for NGS and NGT. Gas assignments, valve bodies, seats, nipples, washers, medical yokes and complete connection interchangeability are not inferred from a matching thread size.

Recorded basis: NBS Handbook H28 (1957), Part II — Gas-cylinder thread requirements, 1957; inspected issue 1959-11-16

Sources and scope
  • Basic inlet construction at separately identified axial planes, functional ramp-gauge rules, and master-setting gauge dimensions/tolerances. Product E0 and E1 are not coincident datums. A complete manufactured contour or seal and independent combined worst-case diameter/taper envelopes are not inferred.
Available scopeCalculate

NGS straight inlets · NBS H28 (1957)

Historical thread dimensions in section IX, with section VII requirements explicitly incorporated for NGS and NGT. Gas assignments, valve bodies, seats, nipples, washers, medical yokes and complete connection interchangeability are not inferred from a matching thread size.

Recorded basis: NBS Handbook H28 (1957), Part II — Gas-cylinder thread requirements, 1957; inspected issue 1959-11-16

Sources and scope
  • The separately specified external and internal NPSM basic profiles and published product bands are retained. External minor/internal major bands are not tabulated and NGS engagement remains source-qualified; no complete as-built profile or end-face seal is inferred.
Available scopeCalculate

Gas-valve safety-device thread · NBS H28 (1957)

Historical thread dimensions in section IX, with section VII requirements explicitly incorporated for NGS and NGT. Gas assignments, valve bodies, seats, nipples, washers, medical yokes and complete connection interchangeability are not inferred from a matching thread size.

Recorded basis: NBS Handbook H28 (1957), Part II — Gas-cylinder thread requirements, 1957; inspected issue 1959-11-16

Sources and scope
  • Thread-only dimensions and named reference planes. Full valve outlet/inlet bodies, seats, seals, medical yokes, start geometry and complete connection compatibility are outside this calculator scope.
Available scopeCalculate

NGO right-hand outlets — FED-STD-H28/9A

Complete published federal thread design, product and master/inspection-gauge data in Revision A. DLA's official record https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=53610 lists this section active with 2024 validation. This is the active federal /9A edition, not a claim to reproduce the current CGA V-1 edition or complete gas-connection bodies, seats and assignments.

Recorded basis: FED-STD-H28/9A — Gas Cylinder Valve Outlet and Inlet Threads, Revision A, 1989; validated by Notice 5, 2024; inspected issue 1989-03-24

Sources and scope
  • Thread dimensions at their stated source planes. Valve bodies, seats, seals, gas assignments and complete connection compatibility require the referenced connection specification.
Available scopeCalculate

NGO left-hand outlets — FED-STD-H28/9A

Complete published federal thread design, product and master/inspection-gauge data in Revision A. DLA's official record https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=53610 lists this section active with 2024 validation. This is the active federal /9A edition, not a claim to reproduce the current CGA V-1 edition or complete gas-connection bodies, seats and assignments.

Recorded basis: FED-STD-H28/9A — Gas Cylinder Valve Outlet and Inlet Threads, Revision A, 1989; validated by Notice 5, 2024; inspected issue 1989-03-24

Sources and scope
  • Thread dimensions at their stated source planes. Valve bodies, seats, seals, gas assignments and complete connection compatibility require the referenced connection specification.
Available scopeCalculate

NGO source calculation data — FED-STD-H28/9A

Complete published federal thread design, product and master/inspection-gauge data in Revision A. DLA's official record https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=53610 lists this section active with 2024 validation. This is the active federal /9A edition, not a claim to reproduce the current CGA V-1 edition or complete gas-connection bodies, seats and assignments.

Recorded basis: FED-STD-H28/9A — Gas Cylinder Valve Outlet and Inlet Threads, Revision A, 1989; validated by Notice 5, 2024; inspected issue 1989-03-24

Sources and scope
  • Thread dimensions at their stated source planes. Valve bodies, seats, seals, gas assignments and complete connection compatibility require the referenced connection specification.
Available scopeCalculate

Custom NGO source-equation design — FED-STD-H28/9A

Complete published federal thread design, product and master/inspection-gauge data in Revision A. DLA's official record https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=53610 lists this section active with 2024 validation. This is the active federal /9A edition, not a claim to reproduce the current CGA V-1 edition or complete gas-connection bodies, seats and assignments.

Recorded basis: FED-STD-H28/9A — Gas Cylinder Valve Outlet and Inlet Threads, Revision A, 1989; validated by Notice 5, 2024; inspected issue 1989-03-24

Sources and scope
  • Thread dimensions at their stated source planes. Valve bodies, seats, seals, gas assignments and complete connection compatibility require the referenced connection specification.
Available scopeCalculate

NGT, chlorine NGT and SGT — FED-STD-H28/9A

Complete published federal thread design, product and master/inspection-gauge data in Revision A. DLA's official record https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=53610 lists this section active with 2024 validation. This is the active federal /9A edition, not a claim to reproduce the current CGA V-1 edition or complete gas-connection bodies, seats and assignments.

Recorded basis: FED-STD-H28/9A — Gas Cylinder Valve Outlet and Inlet Threads, Revision A, 1989; validated by Notice 5, 2024; inspected issue 1989-03-24

Sources and scope
  • Thread dimensions at their stated source planes. Valve bodies, seats, seals, gas assignments and complete connection compatibility require the referenced connection specification.
Available scopeCalculate

NGS engagement — FED-STD-H28/9A

Complete published federal thread design, product and master/inspection-gauge data in Revision A. DLA's official record https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=53610 lists this section active with 2024 validation. This is the active federal /9A edition, not a claim to reproduce the current CGA V-1 edition or complete gas-connection bodies, seats and assignments.

Recorded basis: FED-STD-H28/9A — Gas Cylinder Valve Outlet and Inlet Threads, Revision A, 1989; validated by Notice 5, 2024; inspected issue 1989-03-24

Sources and scope
  • Thread dimensions at their stated source planes. Valve bodies, seats, seals, gas assignments and complete connection compatibility require the referenced connection specification.
Available scopeCalculate

Gas-valve safety-device threads — FED-STD-H28/9A

Complete published federal thread design, product and master/inspection-gauge data in Revision A. DLA's official record https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=53610 lists this section active with 2024 validation. This is the active federal /9A edition, not a claim to reproduce the current CGA V-1 edition or complete gas-connection bodies, seats and assignments.

Recorded basis: FED-STD-H28/9A — Gas Cylinder Valve Outlet and Inlet Threads, Revision A, 1989; validated by Notice 5, 2024; inspected issue 1989-03-24

Sources and scope
  • Thread dimensions at their stated source planes. Valve bodies, seats, seals, gas assignments and complete connection compatibility require the referenced connection specification.
Available scopeCalculate

Rock drilling

ISO 10208:1991 left-hand rope threads

ISO 10208:1991 Table 1 and Figures 1–2: five left-hand rope-thread sizes with 12.7 mm pitch, external/internal diameters, profile depths, radii and tolerances. This ISO edition remains current and was confirmed in 2022.

Recorded basis: ISO 10208:1991 — Rock drilling equipment — Left-hand rope threads, First edition, 1991; inspected issue 1991-02-15

Sources and scope
  • Source-defined circular crest and root arcs with common tangent flanks, separate internal/external depth and diameter tolerances, and a 12.7 mm axial pitch. No V-thread angle or pitch diameter is specified.
Available scopeCalculate