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 6220-01-360-9659
NSN 5985-01-634-0635
NSN 6650-01-202-8014
NSN 5915-00-030-0343
NSN 5925-00-472-3444
NSN 5965-01-617-1977
NSN 5905-01-106-0249
NSN 5835-01-370-8912
NSN 5935-01-599-0836
NSN 5945-00-171-4484
NSN 5965-00-061-1061
NSN 5855-01-513-9601