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 4140-00-768-2855
NSN 5990-01-157-0441
NSN 6130-01-090-6192
NSN 2925-01-387-0870
NSN 6220-01-487-3904
NSN 6105-01-279-9838
NSN 6220-00-269-3783
NSN 5910-01-026-5980
NSN 6145-01-543-0900
NSN 6320-01-412-2973
NSN 6650-01-428-9958
NSN 5910-01-501-5099