ASME B1.20.3 Dryseal Pipe Threads: NPSF (fuel, internal straight)

All 7 thread sizes per ASME B1.20.3. Click any row for full specifications, tolerances, and geometry.

DesignationDiameter (in)TPISpecs
1/16"0.312527 TPI
ExternalInternal
1/8"0.40527 TPI
ExternalInternal
1/4"0.5418 TPI
ExternalInternal
3/8"0.67518 TPI
ExternalInternal
1/2"0.8414 TPI
ExternalInternal
3/4"1.0514 TPI
ExternalInternal
1"1.31511.5 TPI
ExternalInternal

Showing 7 thread sizes • Standards: ASME B1.20.3