12.870 in. Diameter b.C.; 7.310 in. R; 7.710 in. R; 10 0.257 in. Diameter 0.531 in. Dp 0.312-18 nc 2 thd 0.375 in. Full thd holes; 6 0.203 in. Diameter 0.594 in. Dp 0.250-20 unc-3 thd 0.438 in. Full thd; 2 0.422 in. Diameter holes 0.500-13 nc 4 thd; 2 0.375 in. Diameter holes; 8 0.688 in. Diameter holes