D6.180 in. Lg; 3.290 in. Wide; 6 holes 0.089 in. Diameter 0.112 in.-40-unc-2b; 0.160 in. By 45 degrees 2 top corners; 5.800 in. Between holes along lg; 2.950 in. Between center hole and end hole along lg; 0.170 in. From end to hole along lg; 0.170 in. Between hole and corner along width; 2.930 in. Between holes along width; 0.050 in. Thk; al aly qq-a-250/11 6061-t6; chemical film mil-c-5541 class 3 and epoxy mil-c-22750 class 1 type 3 color 37038 fed-std-595