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 5935-01-569-0077
NSN 6110-00-116-1899
NSN 6240-00-185-8367
NSN 6320-01-582-6752
NSN 4140-01-141-7692
NSN 5985-01-153-7613
NSN 6130-01-281-7268
NSN 5985-00-299-3510
NSN 6150-01-502-6017
NSN 5925-00-275-7599
NSN 6650-01-188-4516
NSN 5915-01-408-4655