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 5935-01-634-0668
NSN 6145-00-293-9585
NSN 5950-01-565-3461
NSN 5930-01-067-7930
NSN 5998-01-347-5288
NSN 6135-01-570-2806
NSN 6135-00-050-7189
NSN 6130-01-551-0827
NSN 5915-00-872-0625
NSN 5950-01-587-2427
NSN 6145-00-925-2004
NSN 6150-01-271-5408