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 7035-01-383-6549
NSN 5835-01-100-7405
NSN 5945-01-068-4471
NSN 4140-01-446-6007
NSN 5915-00-407-2910
NSN 5915-01-422-2014
NSN 4140-01-222-7552
NSN 5915-01-555-8751
NSN 6105-01-382-1105
NSN 5910-01-651-1894
NSN 6130-01-463-5566
NSN 5935-01-513-9623