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 5895-00-144-8162
NSN 6685-01-339-9279
NSN 5905-01-429-4925
NSN 6240-01-224-7656
NSN 6150-01-212-0604
NSN 5999-01-167-7298
NSN 6130-00-181-4422
NSN 5895-01-462-0648
NSN 5920-00-220-9110
NSN 5855-01-167-2162
NSN 6130-01-272-9765
NSN 5895-00-561-9149