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 6105-01-130-5901
NSN 6105-01-332-4724
NSN 6150-01-331-9860
NSN 5998-00-257-6018
NSN 5935-01-012-2565
NSN 5960-01-068-4003
NSN 5999-01-471-0769
NSN 2925-01-206-2250
NSN 6135-00-491-9864
NSN 6610-01-063-9303
NSN 5985-00-808-5270
NSN 5998-00-566-3090