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 5925-01-122-0698
NSN 6240-01-557-1177
NSN 6650-01-237-4047
NSN 6145-00-582-1301
NSN 6130-01-319-7176
NSN 5998-00-294-7728
NSN 5950-01-630-1413
NSN 5950-00-984-6177
NSN 5990-01-591-8797
NSN 5990-01-463-2279
NSN 5935-00-013-7404
NSN 5920-01-224-4334