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 5915-01-414-9915
NSN 6650-01-347-0148
NSN 5998-01-629-9380
NSN 4140-00-322-9987
NSN 6145-01-519-8210
NSN 5975-00-445-9926
NSN 2925-01-467-0736
NSN 6610-01-258-6206
NSN 5905-00-596-3283
NSN 5965-01-245-1552
NSN 6135-00-985-7846
NSN 6150-01-465-0764