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 6685-01-198-0375
NSN 6110-01-152-9115
NSN 6220-01-552-2664
NSN 5935-01-116-4451
NSN 5990-01-591-8797
NSN 5835-01-416-6455
NSN 5895-01-094-5689
NSN 5990-00-872-1312
NSN 6240-01-604-9172
NSN 5895-01-319-1954
NSN 6610-00-226-4710
NSN 2925-00-101-7972