||British Standard Pipe Parallel
||Male BSPP with Female BSPP.
Female BSPP with Male BSPP.
Female BSPP with Male BSPT.
|Washer / O-Ring
||Used primarily for threaded ports and is similar to SAE straight thread. The male has straight threads and an o-ring. The BSPP female has straight threads and a sealing face.
||British Standard Pipe Taper
||Male BSPT with Female BSPT.
Male BSPT with Female BSPP.
|The British Standard pipe taper (BSPT) male has tapered threads. The BSPT female has tapered threads.
||Garden Hose Thread
||Male GHT with Female GHT.
Female GHT with Male GHT.
||Thread is the same for all hose sizes. Not compatible with other systems.
||Iron Pipe Straight Thread
||Generic name for straight pipe thread.
||See NPSH for compatibility.
||Iron Pipe Thread
||Generic name for all pipe thread.
||more information required
||Joint Industrial Committee
||Used with other mating JIC threads
||The JIC male has straight threads and a 37 degree flare seat. The JIC female has straight threads and a 37° flare seat. The seal is made on the 37° flare seat.
|NH or NST
||National Hose thread also known as National Standard Thread
||Male NH-NST with Female NH-NST.
Female NH-NST with Male NH-NST.
||Popular on many fire hydrants and accessories. Thread pitch and diameters of fire threads may vary according to local regulations.
||National Pipe Tapered
||Male NPT and Female NPT.
Male NPT with Female NPSM.
Male NPT with Female NPSH.
|American Standard Taper Pipe Thread. Female NPT not compatible with Male NPSM or Male NPSH.
||National Pipe Straight Hose
||Male NPSH and Female NPSH.
Female NPSH with Male NPT.
Female NPSH with Male NPSM.
|American Standard Straight Pipe for hose couplings.
||National Pipe Straight Mechanical
||Male NPSM and Female NPSM.
Female NPSM with Male NPSH.
Female NPSM with Male NPT.
|Seal can be either mechanical or washer.
||American Standard Straight Mechanical Joints.