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 6135-00-735-8530
NSN 5920-00-862-5820
NSN 5855-01-441-3189
NSN 6135-01-113-1507
NSN 5895-00-054-4759
NSN 4140-01-627-1726
NSN 5945-01-361-7118
NSN 4140-00-237-5797
NSN 5835-01-531-0379
NSN 5930-00-935-2151
NSN 5930-01-027-4598
NSN 6110-01-598-1820