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 6240-00-319-4549
NSN 5925-00-611-4120
NSN 6220-01-468-3701
NSN 5925-01-508-9774
NSN 5985-01-241-5761
NSN 5925-01-023-9116
NSN 7035-00-535-8109
NSN 5925-01-634-0664
NSN 6610-00-349-7014
NSN 7035-01-150-6303
NSN 6620-01-498-2052
NSN 5835-01-462-5983