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 5975-01-552-6539
NSN 6220-01-589-6532
NSN 5965-01-384-1953
NSN 5996-01-501-0827
NSN 5935-01-464-8440
NSN 5905-00-717-4636
NSN 6135-00-452-2266
NSN 6620-00-273-8735
NSN 5975-00-086-1423
NSN 6240-01-329-4978
NSN 5920-00-300-1843
NSN 5910-00-117-3957