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 5915-01-299-7843
NSN 6320-01-160-3730
NSN 5965-01-303-6105
NSN 5990-01-094-7740
NSN 4140-00-908-2763
NSN 6240-00-927-3180
NSN 6650-01-392-6076
NSN 5835-00-325-8206
NSN 6150-00-371-9431
NSN 5855-01-416-5085
NSN 5950-01-513-0136
NSN 6145-01-429-5087