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
| Nominal | Dash | Thread type | Pitch / TPI | Major diameter | Seal |
|---|---|---|---|---|---|
| 1/4 | tapered | 19 TPI | 0.518 in / 13.157 mm | thread | |
| 3/8 | tapered | 19 TPI | 0.656 in / 16.662 mm | thread |