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 5920-00-861-6091
NSN 6105-00-223-8471
NSN 6130-01-391-0219
NSN 6150-01-566-4975
NSN 6105-01-382-9690
NSN 5930-00-913-5954
NSN 5920-01-540-4595
NSN 6145-01-560-2262
NSN 6620-01-281-6386
NSN 6150-01-072-2275
NSN 5965-00-815-2525
NSN 5990-00-554-0366