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 5998-01-108-3722
NSN 6150-01-503-0658
NSN 6620-00-927-1790
NSN 6105-01-104-3029
NSN 5960-00-091-8729
NSN 4140-00-019-0928
NSN 5960-00-266-6741
NSN 5925-01-563-5723
NSN 6645-00-527-7258
NSN 5920-00-753-5113
NSN 5945-01-634-0588
NSN 5998-00-141-9872