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 5855-01-274-5311
NSN 5905-00-753-0299
NSN 6650-01-456-6516
NSN 5910-01-331-5076
NSN 5905-00-041-1055
NSN 6610-00-938-2320
NSN 6150-00-278-7070
NSN 7035-01-429-7954
NSN 5998-01-237-4049
NSN 6320-00-908-6841
NSN 6620-01-474-4951
NSN 2925-01-527-8745