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 6650-01-100-0933
NSN 6685-01-192-6928
NSN 5998-01-349-7717
NSN 5965-01-239-4034
NSN 5945-01-527-3833
NSN 4140-00-256-9913
NSN 5975-01-055-2290
NSN 5945-01-199-0269
NSN 5935-00-630-5729
NSN 5965-01-498-4451
NSN 2925-00-631-0548
NSN 6130-01-634-0603