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 6650-01-276-4486
NSN 6320-00-681-1324
NSN 6105-01-220-0686
NSN 6610-01-633-6773
NSN 5935-00-825-2515
NSN 6105-01-244-5739
NSN 6145-01-453-9191
NSN 6650-00-152-8738
NSN
NSN 6645-01-444-3016
NSN 5925-00-578-0479
NSN 5965-00-132-0229