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 5950-00-473-3274
NSN 6620-01-248-0358
NSN 5935-01-645-7715
NSN 7035-00-803-3056
NSN 4140-01-165-2663
NSN 5999-01-083-2741
NSN 5915-01-336-0813
NSN 6135-01-472-9011
NSN 6130-01-469-9834
NSN 5930-01-003-4180
NSN 5935-01-372-5148
NSN 5996-01-281-7336