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 5945-00-042-9442
NSN 6110-01-551-8203
NSN 5925-01-381-0614
NSN 6150-01-595-6131
NSN 5835-00-085-2287
NSN 5998-01-528-8373
NSN 6150-00-726-4705
NSN 6130-01-335-3202
NSN 6645-00-192-1152
NSN 6105-01-512-6029
NSN 2925-00-845-1480
NSN 5905-00-718-6654