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 5935-01-640-6783
NSN 6320-01-132-2746
NSN 5925-00-550-4946
NSN 5895-01-551-6749
NSN 5925-00-202-8715
NSN 6130-00-544-4943
NSN 6685-01-518-5287
NSN 5945-01-648-9654
NSN 6645-01-426-2123
NSN 5930-00-917-3007
NSN 5935-01-334-3017
NSN 5945-01-322-9476