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 5998-00-412-0525
NSN 6320-01-230-8444
NSN 5935-01-634-0668
NSN 6105-00-855-7787
NSN 6240-01-282-0983
NSN 6320-01-600-0787
NSN 5915-00-888-4379
NSN 5920-00-233-8690
NSN 6135-01-391-8539
NSN 6145-01-554-0032
NSN 5950-01-425-1884
NSN 5975-00-173-1810