Pipe threads are british standard pipe - parallel (bspp); has 19.0 mm hex shaped nut for tightening fitting
A fitting that forms an angle of less than 180 degrees (3.142 radians) from the straight flow. One connecting end has standard pipe threads, or is unthreaded and designed to accommodate a pipe. The other end has machine threads (straight threads other than pipe or hose series) designed to accommodate a tube, or is unthreaded and designed to accommodate a tube. It may have side or heel inlet(s). See also elbow, pipe; elbow, tube; and connector, multiple, fluid pressure line.
Classification: Threaded elbows and bends of iron or steel (other than cast iron or stainless steel) for pipes and tubes
NSN 5920-00-149-0013
NSN 5835-01-645-2892
NSN 6620-00-816-9755
NSN 6105-00-466-0588
NSN 5950-01-130-1596
NSN 5965-01-281-0458
NSN 6110-01-073-6117
NSN 6105-00-837-2875
NSN 5945-00-682-9759
NSN 5920-00-998-9528
NSN 5905-01-442-6616
NSN 6240-01-393-4039