Aluminum alloy 7075-t6511, qq-a-200/11, 7.135 in. Lg, 1.094 in. Od, ext spline 1.027 in. Diameter with 34 teeth and 30.0 degrees pressure angle, internal spline with 0.737 in. Major dia, 27 teeth and a 30.0 degrees pressure angle, one end externally thd with 0.938 in. Diameter and 28un-2a thd, internally thd mating end 0.786 in. Id with 32un-2b thd