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 6240-00-224-1880
NSN 6105-01-109-0732
NSN 5965-01-485-0018
NSN 2925-00-675-4728
NSN 6240-00-168-1474
NSN 5960-01-453-6170
NSN 5895-00-175-6415
NSN 6145-01-082-2830
NSN 5990-01-434-7913
NSN 5915-00-181-5876
NSN 5998-01-168-4843
NSN 5965-01-633-8849