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 4140-00-200-9082
NSN 6645-01-602-0000
NSN 5910-01-394-8010
NSN 6130-01-522-4594
NSN 5905-01-538-8455
NSN 5935-01-224-9426
NSN 6320-00-575-6072
NSN 5998-01-346-1362
NSN 5999-00-683-5649
NSN 5975-01-147-6353
NSN 6145-01-130-5416
NSN 6110-01-592-5703