53.095 in. O/a diameter by 0.500 in. Diameter concentrate to 0.375 in. Dia, sleeve 0.375 in. Id, by 0.875 in. Diameter by 0.740 in. Min, 0.760 in. W, 1 hole through both walls 0.187 in. Diameter 1.610 in. From end of shaft to center of hole, shaft and sleeve are matched set