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 6145-00-574-1152
NSN 5925-01-633-7068
NSN 5998-00-205-4138
NSN 5945-01-366-5389
NSN 4140-01-467-6319
NSN 5965-01-353-3725
NSN 6130-01-428-9106
NSN 7035-01-332-9582
NSN 6135-00-583-3966
NSN 5925-01-028-6504
NSN 6110-00-155-8055
NSN 6320-00-908-6841