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 5975-00-448-3179
NSN 2925-00-859-8579
NSN 5895-01-605-1653
NSN 5935-01-331-6321
NSN 6650-00-371-0884
NSN 6110-00-003-8586
NSN 6240-01-423-6771
NSN 6130-00-277-7321
NSN 5855-01-445-7980
NSN 6610-01-367-1640
NSN 6105-01-353-0959
NSN 5985-00-383-6178