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 5920-01-195-2299
NSN 6105-01-645-9402
NSN 5998-00-682-6219
NSN 5965-00-849-1313
NSN 5996-01-467-2177
NSN 4140-01-272-3173
NSN 6130-01-324-1834
NSN 5835-00-594-4921
NSN 5985-01-076-8347
NSN 7035-00-631-3782
NSN 5925-01-160-7609
NSN 5975-00-427-5861