Al aly qq-a-250/11 t6; 0.063 in. Thk; 2.230 in. Long; 1.980 in. Wide; 4 holes 0.140 in. Dia; 0.060 in. Rad 4 corners; center to center distance between holes along width 1.620 in.; center to center distance between holes along lg 1.865 in.; chemical film mil-c-5541 type i or ii grade c class 3