2.8346 in. Min, 2.8353 in. Max od, 1.970 in. Min, 1.971 in. Max id, 5 holes 0.164 in.-36 unf class 3b thd, chamfered 90 degrees by 0.164 in. Min, 0.194 in. Max dia, 4 holes equally spaced and one hole offset 20 degrees on 1.660 in. Bolt circle dia, one end chamfered 45 degrees by 0.030 in. Min, 0.050 in. Max