Hydraulic fittings

BSPT Thread Chart

Reference geometry rows for BSPT thread identification. Use with physical pitch and sealing checks.

Last updated 2026-05-12Confidence: reference-derived2 rows
NominalDashThread typePitch / TPIMajor diameterSeal
1/4tapered19 TPI0.518 in / 13.157 mmthread
3/8tapered19 TPI0.656 in / 16.662 mmthread