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 5855-00-446-5921
NSN 5925-01-347-0358
NSN 4140-01-049-9916
NSN 5960-00-096-2060
NSN 5895-00-337-5575
NSN 5960-01-276-7836
NSN 5905-00-526-9582
NSN 5975-01-087-0808
NSN 6145-00-955-1993
NSN 5985-01-124-8752
NSN 5920-00-192-6565
NSN 5855-00-472-2055