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 6650-00-287-5868
NSN 6240-01-302-3838
NSN 5930-01-523-0239
NSN 5910-00-708-1893
NSN 4140-01-131-1749
NSN 5950-01-395-7629
NSN 7035-00-541-8516
NSN 5985-00-603-5704
NSN 6320-01-393-7022
NSN 5996-01-125-3334
NSN 6610-00-500-6944
NSN 7035-01-485-5114