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 5835-01-631-3940
NSN 6130-00-635-9853
NSN 6135-00-231-7257
NSN 6240-00-449-6003
NSN 6320-01-543-3238
NSN 6620-00-658-6588
NSN 6135-01-440-9412
NSN 5945-01-250-2518
NSN 6620-01-571-7727
NSN 2925-00-084-3765
NSN 6145-01-467-1797
NSN 5998-01-226-9042