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 5855-01-519-3814
NSN 6135-00-334-4500
NSN 6650-00-077-0638
NSN 6650-01-591-5057
NSN 7035-01-523-0139
NSN 5996-00-798-2449
NSN 5935-00-343-7614
NSN 6105-01-580-1548
NSN 5855-01-658-4510
NSN 5935-00-819-3407
NSN 5920-01-059-2680
NSN 5855-00-149-0766