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 5905-00-288-6546
NSN 6145-01-529-9831
NSN 4140-00-701-0406
NSN 5855-00-149-0766
NSN 6135-00-826-4798
NSN 5935-01-027-4355
NSN 4140-01-557-5790
NSN 6320-01-050-1290
NSN 5985-00-331-0735
NSN 6645-01-344-7117
NSN 6145-01-185-7803
NSN 6220-01-290-4739