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 6150-01-055-4673
NSN 6135-01-008-4595
NSN 6685-01-633-7905
NSN 5930-01-520-6009
NSN 6610-01-535-4230
NSN 6135-01-213-7339
NSN 6320-00-476-6898
NSN 5855-01-176-9674
NSN 5999-01-480-9121
NSN 6145-00-148-5748
NSN 7035-00-797-2635
NSN 5990-00-212-4316