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 6135-00-450-3528
NSN 6220-01-571-3894
NSN 5998-00-777-4417
NSN 5945-01-467-9886
NSN 6130-00-549-2607
NSN 6150-01-314-2893
NSN 5910-01-038-2869
NSN 5905-01-564-0749
NSN 6150-01-484-8825
NSN 5920-00-459-4522
NSN 5965-01-604-6812
NSN 5920-01-063-8250