2.999 to 3.000 in. Od; 2.7062 to 2.7064 in. Id; 2.808 to 2.813 in. Dp; material beryllium; 0-80 unf-2b thd, .19 in. Dp, 6 holes equally spaced on a 2.822 diameter bolt hole circle left side; 0-80 unf-2b thd, .19 in. Dp, 8 holes equally spaced on a 2.822 in. Diameter bolt hole circle right side