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 5925-00-275-7599
NSN 6220-00-476-9649
NSN 6645-01-282-3624
NSN 5930-00-188-7281
NSN 5835-00-930-8500
NSN 5999-00-795-1131
NSN 5855-01-379-9978
NSN 6610-01-320-6628
NSN 6320-01-631-7828
NSN 5920-00-171-2347
NSN 6105-01-258-9624
NSN 6145-00-913-8015