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 6135-01-556-7318
NSN 5905-01-155-3099
NSN 2925-01-141-7563
NSN 2925-00-555-8836
NSN 6320-00-894-1644
NSN 5915-01-212-2988
NSN 5910-01-010-8357
NSN 6610-00-248-1559
NSN 5945-01-264-5413
NSN 5945-00-682-1814
NSN 6145-01-389-1545
NSN 5855-01-003-7102