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 6650-00-170-5095
NSN 5998-00-954-8265
NSN 5985-00-155-8590
NSN 2925-01-094-4771
NSN 6645-01-518-1107
NSN 5915-01-100-5834
NSN 5975-01-423-8910
NSN 6320-00-115-0883
NSN 5965-01-396-7508
NSN 6240-01-428-7619
NSN 4140-01-033-1238
NSN 6150-01-619-1963