1steel, 1.000 in. Od, 4.670 in. H, 18.750 in. O/a lg, spline data, 0.715 in. Minor dia, 0.776 in. @major dia, 23 splines, slot 0.575 in. Lg, 0.175 in. W, 0.065 in. Deep, serrations, 0.470 in. Minor dia, 0.500 in. Major dia, vanes, 45 degrees angel fromt to rear