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 6620-01-231-9731
NSN 5975-01-479-2519
NSN 5965-01-195-2168
NSN 5945-00-720-2923
NSN 5935-00-153-3130
NSN 6105-00-864-2819
NSN 6320-01-358-0141
NSN 5920-00-084-6046
NSN 5985-00-762-0107
NSN 4140-00-277-5828
NSN 5945-00-259-2128
NSN 5996-01-465-8024