Bar stock, 7075-t651; 1.375 in. Lg; 1.375 in. W; 0.500 in. Thk; 2 holes, 0.221 in. Dia, center to center 0.874 in. To 0.876 in.; heat treat iaw qq-a-225/9b; 1 hole on thk side top 0.265 in. Diameter thru; top corners chamfered 0.125 in. By 45 degs; surface finish, anodize per mil-a-8625
