MATERIAL ALUMINUM ALLOY 7075-T6 FED SPEC QQ-A-250/13 COND T6; DIA OF FIRST HOLE 0.297 IN MIN AND 0.304 IN MAX; DIA OF SECOND HOLE 0.190 IN MIN AND 0.193 IN MAX; DISTANCE BETWEEN FIRST HOLE AND TOP 1.190 IN MIN AND 1.210; DISTANCE BETWEEN SECOND HOLE AND TOP 1.290 IN MIN AND 1.310 IN MAX; DISTANCE BETWEEN CENTERS OF HOLES 0.740 IN MIN AND 0.760 IN MAX