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 5910-01-254-2162
NSN 5945-00-926-8520
NSN 4140-00-225-8586
NSN 2925-01-068-3844
NSN 5990-00-088-7591
NSN 5835-00-513-9680
NSN 5996-00-161-0148
NSN 5975-01-160-8617
NSN 5895-01-557-8071
NSN 5915-01-123-0778
NSN 6685-01-608-5137
NSN 2925-01-467-1192