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 6240-01-458-5730
NSN 6105-01-491-3006
NSN 5950-01-174-7964
NSN 6105-00-333-3360
NSN 5930-00-957-3335
NSN 6650-00-409-8949
NSN 6105-01-146-1391
NSN 6650-01-417-4277
NSN 5855-01-461-2741
NSN 5945-01-159-4123
NSN 6130-00-382-7735
NSN 5835-01-136-3394