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 6135-01-452-8999
NSN 5915-01-501-5895
NSN 5960-01-424-1781
NSN 6150-01-095-4581
NSN 5945-01-428-9943
NSN 5975-01-447-3419
NSN 6650-00-908-6358
NSN 6645-01-411-5657
NSN 5985-01-117-2298
NSN 5965-01-130-8511
NSN 6130-01-088-5942
NSN 5920-01-634-0250