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 5996-00-126-3153
NSN 5935-01-308-7927
NSN 6110-01-302-6975
NSN 5985-00-114-1812
NSN 5965-01-408-8066
NSN 5985-01-632-2240
NSN 5855-00-149-0766
NSN 6220-00-947-7570
NSN 6105-00-099-8818
NSN 5905-00-850-6238
NSN 5965-00-698-0433
NSN 6650-01-014-9299