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 5935-01-634-0668
NSN 5930-01-263-3893
NSN 5915-01-499-2205
NSN 5999-01-631-0334
NSN 5835-01-377-8972
NSN 6645-00-420-5072
NSN 5925-01-392-0881
NSN 5910-01-125-7522
NSN 4140-00-198-4961
NSN 5855-00-494-9581
NSN 6650-01-452-5379
NSN 5895-01-537-0703