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 5945-01-454-3523
NSN 5905-01-596-4851
NSN 5990-01-425-2175
NSN 6645-01-483-1518
NSN 6240-00-935-4403
NSN 6645-01-338-7066
NSN 6110-01-250-4523
NSN 5996-00-959-4892
NSN 5935-01-018-1716
NSN 6145-00-628-9762
NSN 5915-00-182-8068
NSN 5998-01-523-4346