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 5930-00-255-6218
NSN 5925-00-978-9452
NSN 6105-00-812-8170
NSN 5935-01-039-7120
NSN 6110-01-622-8535
NSN 5985-01-398-6281
NSN 5920-00-777-6490
NSN 5835-01-132-7972
NSN 5935-00-894-0658
NSN 5835-00-523-0736
NSN 6150-00-187-3535
NSN 6650-00-403-5251