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 5930-00-513-7940
NSN 6620-01-425-2750
NSN 6105-01-384-3063
NSN 6105-00-224-2452
NSN 6650-01-428-2251
NSN 6610-01-200-6861
NSN 6150-01-357-8428
NSN 5905-00-517-1658
NSN 5920-00-497-1916
NSN 5905-01-018-4308
NSN 6220-00-269-0459
NSN 5905-01-294-3025