British Whitworth Pipe Thread (BSP / BSPT) - ARMATUREN-WOLFF
BSP Thread Size Information | BSPT | British Standard Pipe Thread
G or R or BSP | Determination – Thread Types | Screw Joints | Technical information | BOLA - Tubing, Stirrer Shafts, Magnetic Stirring Bars - Labware made of PTFE
Thread Identification Guide | HoseandFittings.com
Types of threads: BSP threads · Products · Blog · RMMCIA