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 4140-01-652-8977
NSN 6610-00-338-7349
NSN 5990-01-588-3999
NSN 6105-01-147-9264
NSN 6650-00-195-7519
NSN 6645-01-542-6159
NSN 5945-00-700-1091
NSN 5935-01-656-3694
NSN 5999-00-237-7362
NSN 6105-01-365-3404
NSN 5925-01-419-6225
NSN 6685-01-081-9721