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 6130-01-365-7338
NSN 4140-01-501-1352
NSN 2925-01-518-9038
NSN 6240-01-187-7758
NSN 5895-00-280-7528
NSN 4140-00-575-6586
NSN 5985-01-456-8106
NSN 5999-01-484-1844
NSN 5915-01-147-0872
NSN 6650-00-105-5744
NSN 5920-01-634-0250
NSN 5855-01-372-4433