VHP British Standard Pipe Parallel (BSPP)

Popular coupling standards using British Standard Pipe (BSP) threads, also known as Whitworth threads. The BSPP male will mate with a BSPP female or a female port. The BSPP male has parallel threads and a 30° seat. The BSPP female has parallel threads and a 30° seat. The BSPP female swivel has a tapered nose that seals against the cone seat of the male. The BSPP connector is similar to, but not interchangeable with, the NPSM connector. In most sizes, the thread pitch is different, and the thread angle is 55° instead of the 60° angle used for NPSM threads.