"STEEL FORGING,ALLOY GRADE D; HEATTREATMENT,QUENCH AND TEMPER TO ROCKWELL C31-37; CENTER OPENING 7.260 INCHESDIA.,WIDEST OPENING 8.300 INCHES CUT AT A 45.0 DEG. ANGLE TO CENTER OPENING; OVERALL HEIGHT 4.550 INCHES,OVERALLWIDTH 10.560 INCHES TO LIP; H SPLINE 39 TEETH ON THE BASIS OF 48; J SPLINE 68 TEETH"