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 6320-01-119-3935
NSN 6320-01-521-1764
NSN 6135-00-422-3967
NSN 6220-00-414-7528
NSN 5990-00-883-6364
NSN 5855-01-634-0259
NSN 5990-01-421-3325
NSN 6610-01-186-6535
NSN 5960-01-457-7432
NSN 6105-01-634-0322
NSN 5855-01-554-5794
NSN 6220-01-193-1970