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 4140-01-104-4727
NSN 7035-00-299-7150
NSN 6130-01-106-4267
NSN 5998-01-586-8082
NSN 5935-00-903-6170
NSN 6105-00-404-1637
NSN 5998-01-478-6481
NSN 5985-01-580-1885
NSN 5965-01-603-0118
NSN 7035-00-631-3782
NSN 5935-01-413-2144
NSN 6150-00-882-5050