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 6110-01-388-2389
NSN 6645-00-736-0476
NSN 6150-00-676-6302
NSN 6130-01-113-5599
NSN 5985-00-901-3895
NSN 6110-00-753-7677
NSN 5999-01-038-2073
NSN 5910-01-429-8749
NSN 5920-01-206-3977
NSN 5910-00-819-7095
NSN 4140-01-613-0283
NSN 6130-00-255-1393