Carbon steel adapters of BSPP&BSPT threads: • BSP is BRITISH STANDARD PIPE – Also known as Whitworth 55° Thread Form • BSPT is BRITISH STANDARD PIPE TAPER – Thread form per AS 1722.1, BS 21, ISO 7 • BSPP is BRITISH STANDARD PIPE PARALLEL – Thread form per AS 1722.2, ISO 228
Carbon steel adapters of 1SG is Popular couplings have British Standard Pipe (BSP) threads, also known as Whitworth threads. These can be parallel threads (BSPP) with a 30° inverted flare or tapered threads (BSPT), with a 30° inverted flare. Port connections are usually made with BSPP threads and a soft metal cutting ring for sealing. The BSPP (parallel) male will mate with a BSPOR (parallel) female or a female port. The BSPP male has straight threads and a 30° seat. The BSPOR female has straight threads, a 30° seat, and O-ring. The female port has straight threads and a spotface. The seal on the port is made with an O-ring or soft metal washer on the male. The BSPP (parallel) connector is similar to, but not interchangeable with, the NPSM connector. The thread pitch is different in most sizes, and the thread angle is 55° instead of the 60° angle found on NPSM threads
Note: F end is connected with DIN 3852 port.
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