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 5835-01-485-1408
NSN 5990-01-384-2697
NSN 7035-01-328-7448
NSN 5895-00-357-4535
NSN 6105-01-641-3334
NSN 5905-01-004-7590
NSN 6645-01-587-4642
NSN 6620-01-014-6913
NSN 6150-01-429-8189
NSN 5935-00-925-2536
NSN 6620-01-068-0046
NSN 5965-01-171-9796