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 5905-01-064-4030
NSN 6610-00-111-3159
NSN 5960-00-529-2704
NSN 6135-01-268-7056
NSN 6220-00-266-8222
NSN 6135-01-570-4284
NSN 5999-01-528-3251
NSN 5975-01-634-0678
NSN 5998-01-336-7196
NSN 6105-01-218-5911
NSN 6240-00-316-3167
NSN 5998-01-532-0510