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 6135-01-393-4746
NSN 6150-01-158-6841
NSN 5965-00-949-0234
NSN 6110-00-728-4515
NSN 5920-00-814-2328
NSN 6145-01-357-7853
NSN 4140-00-249-5603
NSN 5965-01-574-3508
NSN 5999-01-192-2068
NSN 5895-01-024-9573
NSN 5965-01-399-8454
NSN 5905-00-179-2336