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 6650-00-272-2271
NSN 5910-01-381-3009
NSN 6105-01-447-5129
NSN 7035-01-196-3445
NSN 5925-00-988-6837
NSN 5930-00-613-5534
NSN 5910-00-226-7146
NSN 5935-00-540-8615
NSN 5999-01-563-0645
NSN 6145-00-918-9494
NSN 5855-00-688-9954
NSN 6110-00-816-0816