A nut having 12 drive points and 24 sides. The bearing surface may be washer faced. An integral locking feature is incorporated in the design of the head or in the threads.
NSN 6685-00-928-7639
NSN 6645-00-140-5173
NSN 6130-01-092-4759
NSN 5925-01-530-7188
NSN 6110-01-176-0410
NSN 5965-00-088-1722
NSN 6130-01-400-0736
NSN 5835-00-409-8355
NSN 5920-00-499-8285
NSN 4140-01-172-3380
NSN 5910-01-431-3545
NSN 5915-01-462-0432