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 6105-00-686-1732
NSN 6150-01-513-3343
NSN 5855-00-149-0766
NSN 6320-01-578-6006
NSN 5985-01-322-4933
NSN 6150-01-528-3022
NSN 6145-01-469-5599
NSN 5998-01-178-0492
NSN 5915-01-174-1164
NSN 5950-01-429-8741
NSN 6320-01-411-6610
NSN 5895-00-757-9250