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 5915-00-752-4458
NSN 6650-00-908-6358
NSN 6150-01-526-0158
NSN 5990-01-493-4039
NSN 6650-00-921-8463
NSN 5855-01-117-7207
NSN 5935-00-228-6690
NSN 5945-00-779-9841
NSN 5985-00-905-6609
NSN 6105-00-236-6300
NSN 6650-01-317-7975
NSN 5985-01-174-3324