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 5950-01-428-7776
NSN 5999-01-322-9511
NSN 6240-01-390-2597
NSN 5925-00-926-8425
NSN 5925-01-463-0305
NSN 5960-01-147-3764
NSN 6105-00-241-5864
NSN 6130-00-612-7161
NSN 6240-01-577-3501
NSN 5855-00-337-3679
NSN 6220-01-094-4441
NSN 6110-01-258-7120