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 5945-01-598-2479
NSN 6105-00-737-0829
NSN 5985-00-467-0073
NSN 6110-01-497-4559
NSN 5998-01-384-3148
NSN 5999-01-605-1731
NSN 4140-01-447-3141
NSN 5965-01-086-5692
NSN 6220-01-415-4164
NSN 6240-00-389-4822
NSN 6105-00-369-7700
NSN 5855-00-763-2155