Housing with spherical ball of corosion resistant steel, outside diameter 3.110 in. Min 3.140 in. Max, 1.146 in. Min 1.166 in. Max thk; counter bore depth 1.146 in. Min 1.156 in. Max, counterbore diameter 1.5625 in. ; four mounting holes 0.010 in. equally spaced on 2.500 in. Diameter bolt circle; swivels for angular misalignment, max bearing misalignment plus-minus 5 degrees 45 minutes, supports torque line