37 degrees surface shall be free of anodize and alodined per mil-c-5541, class 1a
A fitting that forms an angle of less than 180 degrees (3.141 radians) from a straight flow. Both connecting ends have 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 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 4140-01-330-8141
NSN 5905-01-200-9204
NSN 4140-01-411-2704
NSN 6645-01-515-7507
NSN 4140-01-462-4242
NSN 5925-00-533-1547
NSN 5935-01-640-8235
NSN 5945-00-421-0564
NSN 6685-01-472-3614
NSN 6145-00-336-1986
NSN 5998-01-514-7857
NSN 5920-01-651-6933