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 6105-01-634-0322
NSN 5998-01-602-9629
NSN 6685-00-575-4647
NSN 6320-01-411-6610
NSN 5965-00-826-1841
NSN 5945-01-098-2150
NSN 6150-00-288-6245
NSN 6220-01-141-6900
NSN 5920-01-531-1137
NSN 6650-01-027-7165
NSN 6145-01-278-5119
NSN 5935-01-344-8328