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 5999-01-167-8563
NSN 5998-01-006-7955
NSN 2925-01-496-1068
NSN 5945-01-215-1190
NSN 5915-00-841-6918
NSN 5910-01-542-8835
NSN 6135-00-990-1822
NSN 5990-00-825-2882
NSN 6105-01-605-3555
NSN 5835-01-371-8759
NSN 5998-00-955-5901
NSN 5998-01-582-7628