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 2925-00-769-3293
NSN 5998-01-600-0227
NSN 6240-00-603-6662
NSN 6320-00-139-1090
NSN 6150-01-449-5635
NSN 5925-00-196-6978
NSN 5930-01-159-1631
NSN 5975-01-023-1977
NSN 5855-00-433-2377
NSN 5935-00-274-7348
NSN 5960-00-140-9583
NSN 5960-01-641-5493