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 6220-01-436-3850
NSN 5945-00-564-9545
NSN 6685-00-146-2308
NSN 5925-01-492-8354
NSN 5920-00-779-9560
NSN 5990-00-501-4994
NSN 6685-00-385-9018
NSN 6610-00-432-3161
NSN 6105-01-047-7566
NSN 5990-00-836-7962
NSN 6620-00-872-5032
NSN 6220-01-360-2532