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 5935-00-079-3171
NSN 5945-01-629-9492
NSN 6150-01-547-7224
NSN 6240-01-560-0910
NSN 5855-01-259-0995
NSN 5910-00-871-8454
NSN 6610-01-545-0766
NSN 6220-01-283-6802
NSN 4140-01-429-8545
NSN 5990-00-947-6879
NSN 5998-01-372-0745
NSN 5920-00-036-6108