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 6645-01-159-1489
NSN 6105-00-831-6113
NSN 6105-00-082-3210
NSN 6650-01-076-6685
NSN 5835-01-544-2035
NSN 6135-01-294-2131
NSN 6650-01-183-0711
NSN 6130-01-430-4347
NSN 6610-01-033-1748
NSN 5996-00-740-7272
NSN 5965-01-506-9438
NSN 4140-01-590-1632