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 6320-01-352-5653
NSN 5910-01-034-6451
NSN 5998-00-404-2549
NSN 6130-01-518-8118
NSN 5990-00-221-0878
NSN 6240-00-935-7058
NSN 5895-00-711-0628
NSN 6110-00-784-7015
NSN 6135-01-324-2505
NSN 6145-01-430-2784
NSN 6145-00-889-9764
NSN 5998-01-175-1516