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 6130-00-369-1627
NSN 5998-01-200-1715
NSN 5910-01-525-8728
NSN 6135-01-657-0554
NSN 5990-00-665-4105
NSN 5895-00-567-1140
NSN 5950-00-981-6604
NSN 5945-01-657-0207
NSN 6650-01-005-0714
NSN 4140-01-294-4044
NSN 5950-01-447-2839
NSN 5960-00-722-6845