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 5945-00-604-0820
NSN 5835-00-251-9138
NSN 5905-01-463-8665
NSN 5905-00-003-5714
NSN 5960-01-190-2996
NSN 5910-00-625-5877
NSN 6145-01-516-1838
NSN 5945-01-613-0187
NSN 5965-00-836-2690
NSN 5990-01-493-4039
NSN 6650-01-426-4253
NSN 6105-00-235-7982