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 6135-01-504-4309
NSN 5990-01-525-2250
NSN 6110-01-453-5518
NSN 5999-00-337-6435
NSN 2925-01-462-1620
NSN 6145-01-510-7823
NSN 6650-01-399-8552
NSN 5895-00-885-6871
NSN 5895-01-341-9212
NSN 5935-00-225-8689
NSN 7035-00-392-5417
NSN 5945-00-201-7834