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 6105-00-038-3957
NSN 6135-01-633-8502
NSN 6620-01-426-2220
NSN 6220-01-015-2494
NSN 6650-01-552-0515
NSN 5835-01-481-4204
NSN 6610-00-509-0887
NSN 6220-01-462-5381
NSN 6135-01-587-5002
NSN 5996-00-594-8587
NSN 6105-01-554-9764
NSN 6320-00-139-1090