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 6110-01-269-0524
NSN 4140-00-541-9077
NSN 6150-00-466-2892
NSN 5960-01-579-1661
NSN 5855-00-294-7532
NSN 5960-00-973-4551
NSN 5960-00-578-8796
NSN 5855-00-147-2508
NSN 5960-01-484-7966
NSN 5945-00-657-6388
NSN 6145-00-126-1606
NSN 6645-01-356-6929