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 5910-00-225-0370
NSN 5910-01-084-9568
NSN 6220-01-380-6204
NSN 5935-01-322-5966
NSN 5985-01-169-2145
NSN 5945-01-416-9259
NSN 5905-00-934-2872
NSN 5990-00-435-9400
NSN 5999-01-058-2832
NSN 2925-00-928-5931
NSN 6650-01-141-5999
NSN 6320-00-459-8973