BSP

BSP stands for British Standard Pipe. It is a family of technical standards for screw threads for interconnecting and sealing pipes and fittings by mating an external (male) thread with an internal (female) thread. The BSP connections include two types of threads, BSPP which are straight (or parallel) and BSPT which are tapered. The BSPT tapered male will mate with a BSPT tapered female (usually a port) and seals on the threads. The BSPP parallel male has a 30° chamfered seat which seals with a BSPP swivel female on its 30° cone seat. (Similar to the American NPSM-NPTF connection, however the BSPP swivel female end is commonly found on couplings.)