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 5945-00-078-6003
NSN 5975-00-571-4143
NSN 5920-00-252-1978
NSN 6145-00-115-6355
NSN 5855-00-149-0766
NSN 5999-00-925-2502
NSN 5855-01-013-6864
NSN 5998-01-568-8739
NSN 5925-01-563-9089
NSN 5990-01-210-9788
NSN 5960-00-232-2512
NSN 4140-00-122-6422