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 6650-01-365-4286
NSN 5950-00-300-4763
NSN 5975-01-146-4796
NSN 6650-01-088-1200
NSN 5945-01-324-8066
NSN 4140-00-943-8503
NSN 5920-01-406-5648
NSN 5965-01-050-4133
NSN 6320-00-513-8376
NSN 5895-01-422-5366
NSN 6105-01-537-7634
NSN 5999-00-080-4860