9.062" outside diameter circumferential groove in face of raised surface 0.500 in. dp, 0.656 in. wd; cbore aperture 4.000 in. dia, 0.906 in. dp; two circumferential grooves in. aperture id, 0.125 in. wd, 0.063 in. dp; four holes on 5.875 in. dia blt cir, 0.107 in. dia by 0.500 in. dp, countersunk 0.188 in. dia by 60.0 deg., tap 0.138-32 unc 0.250 in. dp; four holes in od of flanges, 0.250-20 unc tap by 0.375 in. dp, equally spaced round
