0.250" hole diameter 3.250" outside diameter 4 bolt hole quantity one additional 0.250 in. dia bolt hole located 0.526 in. from centerline of any one other bolt hole on same bolt circle circular
0.281" hole diameter 4.125" outside diameter 4 bolt hole quantity 0.312 in. radius keyway on periphery of aperture spaced 45 deg below bolt hole located at 9 o clock circular