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 5920-00-445-3585
NSN 6145-01-269-7397
NSN 5975-00-146-7925
NSN 6110-01-575-9217
NSN 5935-01-358-1929
NSN 6150-01-414-4945
NSN 6645-01-068-3042
NSN 5935-01-634-0668
NSN 5835-01-399-5820
NSN 5855-00-688-9954
NSN 5960-00-936-1307
NSN 5935-00-527-3826