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 5999-01-274-0753
NSN 4140-01-323-0108
NSN 6145-00-559-7774
NSN 5950-01-015-4990
NSN 5998-00-100-4948
NSN 5855-00-586-6255
NSN 5920-01-264-9259
NSN 6105-01-616-0903
NSN 6220-01-484-0365
NSN 6610-01-581-0909
NSN 6130-01-547-7437
NSN 6620-01-088-1272