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Pg conduit

Pg conduit threads use an 80° included angle and numbered catalog sizes. A Pg number is not a millimetre diameter.

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Example designation

PG 7

PG
Pg conduit thread family.
7
Catalog size with a 12.5 mm nominal major diameter and 1.27 mm pitch.
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Read the number as a size code

The catalog contains Pg 7 through Pg 48, including Pg 13.5. Selecting a size supplies its diameter and pitch together; the number itself is neither of those dimensions.

Inspect the 80° profile

The wider included angle changes thread height and measuring-wire geometry. Use the Pg pitch-diameter and three-wire results when checking a male conduit thread.