"ALUMINUM ALLOY,QQ-A-225/6,T4 OR T351,FINISH PER MIL-A-8625,TYPE 1,0.808 IN. MIN 0.810 IN. MAX OD,0.595 IN. MIN 0.605 IN. MAXH,0.200 IN. ID,2 HOLES SPACED 0.653 IN. MIN 0.659 IN. MAX,2 HOLES0.080 IN. MIN 0.085 IN. MAX DIA 0.080 IN. DEEP COUNTERSINK 90 DEGTO 0.100 IN. DIA"