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 6110-01-338-5317
NSN 6110-01-135-6584
NSN 6240-01-055-5193
NSN 5999-01-303-0853
NSN 6145-01-384-6003
NSN 5935-01-092-9835
NSN 4140-00-232-1039
NSN 6610-00-968-8193
NSN 5945-00-854-4635
NSN 5920-01-147-6860
NSN 6645-00-842-4653
NSN 5990-00-192-1753