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 6130-01-583-1220
NSN 5945-01-333-3184
NSN 5985-01-263-2543
NSN 5835-01-245-8077
NSN 6220-01-496-8312
NSN 5945-01-421-9818
NSN 5935-01-229-4091
NSN 6105-01-451-1864
NSN 5945-00-079-0884
NSN 5930-00-334-8939
NSN 5905-00-465-5087
NSN 6145-01-180-4577