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 5985-01-443-3287
NSN 5960-01-338-0688
NSN 6610-01-167-8747
NSN 6145-00-808-4849
NSN 5965-01-367-7380
NSN 5985-01-572-4772
NSN 6105-00-036-5138
NSN 5935-01-298-0475
NSN 5855-00-411-8688
NSN 6135-00-643-4843
NSN 5835-01-422-7393
NSN 4140-01-229-2742