"MATL ALUMINUM ALLOY,2024-T3; FINISH ANODIZE,MIL-A-8625,TYPE 1; 0.862 IN. O/A LG; 0.620 IN. O/A W; 0.063 IN. O/A THK; TWO 0.094 IN. DIA MTG HOLES THRU WITH 82 DEG COUNTERSINK TO 0.180 IN. DIA IRREGULARLY SPACED; ONE 0.170 IN. DIA HOLE THRU CENTRALLY LOCATED"