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 6620-01-245-0184
NSN 7035-01-068-4175
NSN 5855-01-602-9653
NSN 5935-00-579-5638
NSN 5950-00-163-1047
NSN 5965-01-525-0893
NSN 5996-01-061-2775
NSN 5998-01-439-1960
NSN 6105-00-351-8009
NSN 5935-01-535-0990
NSN 6135-00-557-8874
NSN 6650-01-157-8806