"ALUMINUM ALLOY QQ-A-200/2 COMP 2014 COND T6,ANODIZE MIL-A-8625 TY 1 OR TY 2,3.232 IN. MIN TO 3.237 IN. MAX O/A DIA,2.320 IN. ID,0.149 IN. MIN TO 0.151 IN. MAX THK,8 HOLES 0.120 IN. DIA EQUALLY SPACED ON 2.750 IN. BOLT CIRCLE,MACHINED SURFACES 125.0 MICROINCH FINISH"