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 5930-00-576-7369
NSN 5998-01-515-4094
NSN 5895-01-435-4386
NSN 5920-01-184-7530
NSN 6240-01-227-4178
NSN 6105-00-116-9717
NSN 4140-01-519-9343
NSN 6220-01-159-9080
NSN 5915-01-358-7346
NSN 6650-01-268-9702
NSN 5915-00-727-8378
NSN 6135-01-238-2878