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G 1/2 thread dimensions

ISO 228-1 (BSPP) · Parallel · 55°

Dimensions

Standard
ISO 228-1 (BSPP)
Form
Parallel
Major diameter
20.955 mm
Threads per inch
14
Pitch
1.814 mm
Flank angle
55°
Seals on
Gasket / O-ring
Used for
Process connections

Check a measurement against this thread

Easily confused with

ThreadStandardMajor diameterFlankSeals on
R 1/2ISO 7-1 (BSPT)same diameter; same pitch55°Thread + sealant
1/2 NPTASME B1.20.10.38 mm larger in diameter; same pitch60°Thread + sealant

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