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 5930-01-657-1791
NSN 5895-01-019-0935
NSN 6320-01-554-0901
NSN 5945-01-490-5722
NSN 5855-00-586-6255
NSN 5915-00-518-1644
NSN 6240-00-491-7191
NSN 5945-01-619-4458
NSN 6105-01-152-7059
NSN 6320-00-331-7138
NSN 6320-01-054-3046
NSN 6105-01-099-4813