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 5930-01-161-2131
NSN 5998-00-613-4121
NSN 6645-01-579-4247
NSN 6130-00-369-1627
NSN 6685-01-134-9561
NSN 6240-01-419-8746
NSN 2925-01-141-7563
NSN 6685-01-374-6878
NSN 6645-00-806-6961
NSN 6685-01-260-4307
NSN 6610-01-549-7565
NSN 5975-00-400-2630