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 5950-01-341-6612
NSN 6645-01-079-1262
NSN 5990-00-402-7360
NSN 6135-01-400-2947
NSN 6130-01-418-4335
NSN 5975-00-850-4622
NSN 5930-01-217-5867
NSN 6150-01-300-4475
NSN 7035-00-731-8729
NSN 6645-01-374-9936
NSN 6650-00-690-8709
NSN 5998-01-062-5819