A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6650-01-200-7657
NSN 7035-01-018-9629
NSN 6240-00-832-6867
NSN 7035-01-017-2702
NSN 5935-01-207-0938
NSN 2925-00-572-0454
NSN 6620-01-216-0904
NSN 5950-01-562-2108
NSN 6220-00-912-6890
NSN 6620-00-646-9474
NSN 6650-00-622-4991
NSN 6145-01-119-3746