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 6135-01-361-1776
NSN 6610-00-285-5366
NSN 5920-00-004-6372
NSN 5999-01-514-9694
NSN 5990-01-231-1214
NSN 5960-00-884-2535
NSN 2925-01-651-4870
NSN 5835-01-510-1873
NSN 5965-01-559-1898
NSN 6150-01-492-6506
NSN 6610-01-085-8873
NSN 6135-00-248-4102