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 6145-01-287-1962
NSN 6240-01-130-7854
NSN 5915-01-193-9968
NSN 6620-00-096-6306
NSN 6110-00-188-9874
NSN 6150-01-027-0798
NSN 5960-01-178-7500
NSN 6620-00-783-9560
NSN 5905-01-487-5744
NSN 5975-01-211-6594
NSN 6610-01-159-0438
NSN 5895-01-394-8428