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 5990-01-449-7090
NSN 5945-00-405-9345
NSN 5905-01-600-3189
NSN 6220-01-115-3027
NSN 6105-01-453-6510
NSN 5999-00-212-7853
NSN 6150-01-179-7036
NSN 6220-01-646-8331
NSN 5920-01-146-6690
NSN 7035-00-679-9027
NSN 5835-00-170-5238
NSN 7035-01-524-7018