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 6135-01-604-8739
NSN 6645-01-594-6407
NSN 6685-00-528-5175
NSN 5935-01-422-8189
NSN 6150-01-353-3993
NSN 6650-01-145-5173
NSN 5998-00-346-2770
NSN 6145-01-540-7751
NSN 5985-00-679-5718
NSN 5905-01-634-0595
NSN 6135-00-027-3914
NSN 2925-00-858-8928