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 5895-01-372-2301
NSN 6620-01-279-8884
NSN 5855-01-062-5655
NSN 5945-01-256-4133
NSN 5835-00-129-9913
NSN 6105-01-567-9538
NSN 6150-01-348-8970
NSN 5910-01-388-5958
NSN 5905-00-903-6368
NSN 6650-01-417-1797
NSN 4140-00-773-6474
NSN 6220-01-063-4665