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 6130-01-389-8071
NSN 5999-00-085-2510
NSN 5930-01-064-5767
NSN 5920-01-491-7008
NSN 5855-01-031-4729
NSN 5835-01-416-6455
NSN 5895-00-284-4835
NSN 4140-01-470-8518
NSN 6610-01-415-5877
NSN 5935-01-519-9189
NSN 6150-01-634-0575
NSN 5905-01-528-9209