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 5990-00-834-6842
NSN 6145-01-485-4690
NSN 5915-01-387-2751
NSN 5895-01-642-3868
NSN 5965-01-576-8847
NSN 5965-01-611-0131
NSN 5999-00-253-7484
NSN 6150-00-442-2152
NSN 6105-01-238-4972
NSN 5930-01-634-0659
NSN 5975-00-802-6531
NSN 5935-01-169-8180