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 6130-01-479-8689
NSN 6110-00-514-2639
NSN 6610-01-593-0135
NSN 5950-00-542-0627
NSN 5999-01-235-9564
NSN 5935-01-633-9467
NSN 5920-00-691-7727
NSN 5950-00-998-7002
NSN 5935-01-367-0968
NSN 6150-01-334-3016
NSN 5895-00-159-1237
NSN 5945-01-432-4977