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 6150-01-114-7647
NSN 6110-00-752-2757
NSN 5895-00-012-7493
NSN 5920-01-034-8816
NSN 2925-01-443-5929
NSN 6110-00-597-8072
NSN 5915-00-206-0086
NSN 5990-01-612-5323
NSN 7035-01-441-0942
NSN 7035-01-578-6909
NSN 6220-01-166-0004
NSN 6650-01-289-0524