# BSPP — Hydraulic and pipe connection type identification

For BSPP, governing standard is BSP; region of origin is British Connections; thread type (tapered or parallel) is parallel; seat or flare angle is cone seat; seal method is A captive seal is made using metal to metal angled surfaces or a combination of metal to metal and an O-ring, recorded from its source on 2026-08-13.

- **Connection type:** BSPP _(verified: appears in the quote below)_
- **Governing standard:** BSP
- **Region of origin:** British Connections _(our reading, not quoted from the source)_
- **Thread type (tapered or parallel):** parallel _(verified: appears in the quote below)_
- **Seat or flare angle:** cone seat _(verified: appears in the quote below)_
- **Seal method:** A captive seal is made using metal to metal angled surfaces or a combination of metal to metal and an O-ring. _(verified: appears in the quote below)_
- **Interchangeability notes:** very similar (but not interchangeable) with the American NPSM male _(verified: appears in the quote below)_

## What the source says

> The British Standard Pipe Parallel (BSPP) male connection is comparable to NPSM male except most sizes have a different thread pitch. A captive seal is made using metal to metal angled surfaces or a combination of metal to metal and an O-ring. This type of connection is very similar (but not interchangeable) with the American NPSM male. The female swivel BSPP has a tapered nose flareless swivel where the seal occurs on the cone seat of the male connector.

## Source

- https://brennaninc.com/connection-types/

Last verified: 2026-08-13. Review by: 2028-08-12.
Part of [Hydraulic and pipe connection type identification](https://referencesource.org/hydraulic-pipe-connection-types/).