Aluminun alloy, spec qq-a-601 cl 10m cond t6 or cl 4m cond t6 or specification qq-a-596 cl 6, 6.092 in. Lg, 4 holes through 0.3488 in. Max dia, c to c between holes on 3 sides 2.085 in. Max lg, c to c between holes on 1 side 2.005 in. Max lg, 1 end 1.78 in. Dia, opposite end 1.54 in. Dia, inner