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 5996-01-017-6762
NSN 6240-01-503-8543
NSN 6135-01-231-4809
NSN 5920-00-997-5983
NSN 6620-00-379-2856
NSN 5960-01-546-2379
NSN 5975-00-661-1832
NSN 5998-01-398-0673
NSN 6145-01-523-8969
NSN 5835-01-399-5820
NSN 6650-01-192-7449
NSN 2925-01-133-8128