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 6135-01-238-2878
NSN 5935-00-849-3900
NSN 6650-01-605-2302
NSN 5950-01-344-1347
NSN 7035-00-535-8109
NSN 5960-00-729-8150
NSN 4140-01-399-4352
NSN 5998-01-019-7682
NSN 6145-01-062-1598
NSN 6150-00-151-6771
NSN 6105-01-418-0824
NSN 5910-00-226-1123