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 6105-00-288-5872
NSN 2925-01-600-2309
NSN 5925-01-255-9471
NSN 6650-00-486-7924
NSN 5999-01-075-0649
NSN 6620-00-941-5672
NSN 5998-01-123-3637
NSN 5895-00-221-1315
NSN 5855-00-631-4565
NSN 6110-01-069-4895
NSN 5835-01-250-9592
NSN 5945-00-597-5722