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 6620-00-735-2892
NSN 5990-01-331-2221
NSN 6130-00-134-1746
NSN 5905-01-367-2819
NSN 5915-01-584-2404
NSN 6145-00-064-0072
NSN 6135-01-421-7168
NSN 5905-00-534-7698
NSN 5965-01-071-3704
NSN 6645-00-776-4462
NSN 5935-00-382-6464
NSN 6610-01-633-8931