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 6650-00-262-2324
NSN 5945-01-157-6637
NSN 5999-00-964-5716
NSN 5960-01-579-9493
NSN 5915-01-042-7629
NSN 5990-01-188-7309
NSN 5920-00-579-2286
NSN 6220-01-446-8454
NSN 6645-01-428-3576
NSN 6130-00-632-9275
NSN 5920-00-450-6192
NSN 4140-00-427-6638