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 5990-00-226-7894
NSN 5960-01-491-9916
NSN 7035-00-437-7950
NSN 5985-01-539-1741
NSN 5915-00-353-0853
NSN 5945-01-229-7535
NSN 6320-01-578-6006
NSN 7035-01-284-5043
NSN 5935-01-403-2844
NSN 6145-01-251-2970
NSN 6320-01-421-6355
NSN 6105-01-441-4503