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 6650-01-302-9695
NSN 5945-01-524-9667
NSN 6320-01-643-0850
NSN 6220-01-391-5323
NSN 5855-00-436-3852
NSN 5905-01-462-0057
NSN 5905-01-110-6187
NSN 4140-00-038-7577
NSN 6110-01-513-9358
NSN 6620-01-308-5723
NSN 6220-01-446-6430
NSN 5998-01-653-3993