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 5945-00-001-9721
NSN 5835-00-518-2740
NSN 6220-01-013-9498
NSN 4140-01-228-2384
NSN 6620-01-182-9904
NSN 6685-01-611-7849
NSN 4140-01-317-0660
NSN 6320-01-094-2634
NSN 6650-00-826-7396
NSN 5910-00-465-3399
NSN 7035-00-064-7008
NSN 4140-01-439-7530