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 5920-01-545-7701
NSN 5999-01-422-1056
NSN 6620-01-322-8382
NSN 4140-00-406-4369
NSN 6240-00-050-4522
NSN 6130-01-461-4210
NSN 6130-00-701-3999
NSN 6610-00-428-3678
NSN 5990-00-197-0159
NSN 5915-01-445-6577
NSN 5930-01-028-4392
NSN 5945-01-513-9686