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 6610-01-035-1252
NSN 5975-01-132-1664
NSN 7035-01-501-5938
NSN 6130-01-437-6668
NSN 5855-01-634-0259
NSN 6105-00-975-9560
NSN 6110-01-554-7406
NSN 4140-01-550-4627
NSN 5998-01-185-6591
NSN 4140-00-054-6467
NSN 5895-01-607-8702
NSN 6650-01-302-4451