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 6610-01-440-9913
NSN 6130-00-930-8823
NSN 6145-01-288-0180
NSN 5965-01-395-7527
NSN 6620-01-003-2905
NSN 5960-01-604-1158
NSN 2925-01-139-5144
NSN 5930-00-399-3237
NSN 4140-00-074-4242
NSN 5960-01-526-3843
NSN 5930-01-211-9067
NSN 5930-00-506-2231