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 5905-00-523-0191
NSN 5935-00-252-8018
NSN 6105-01-265-8693
NSN 5935-00-690-1623
NSN 6145-01-399-0467
NSN 6135-01-056-4609
NSN 6620-01-633-8443
NSN 5855-01-412-5147
NSN 6645-00-845-1071
NSN 2925-01-231-6312
NSN 6610-01-378-2789
NSN 5965-01-270-1039