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 5990-00-933-9110
NSN 5835-01-055-1911
NSN 5930-01-467-2488
NSN 6145-00-771-7873
NSN 6320-01-431-4359
NSN 6150-01-167-2982
NSN 6105-00-758-0610
NSN 5998-01-392-0999
NSN 5920-00-613-0114
NSN 5915-00-901-4620
NSN 6150-00-004-1225
NSN 5895-00-514-2905