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 5998-00-146-3853
NSN 6130-01-371-2960
NSN 5965-01-491-4983
NSN 6610-01-254-3486
NSN 5925-01-153-0144
NSN 5920-01-400-2558
NSN 5998-01-612-3303
NSN 5950-00-117-9424
NSN 6220-01-069-2340
NSN 6220-00-968-6665
NSN 4140-01-519-8590
NSN 6240-01-129-7060