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 6620-01-229-7381
NSN 5935-01-242-9544
NSN 6650-01-071-4514
NSN 6130-01-602-8991
NSN 5960-01-294-2397
NSN 5990-01-411-7706
NSN 5935-01-482-3966
NSN 6145-00-181-9622
NSN 5990-00-146-3534
NSN 5945-01-189-1874
NSN 6220-01-418-1649
NSN 6685-00-227-0212