O/a lg 3.605 in. Min, 3.620 in. Max; o/a w 3.170 in. Min, 3.185 in. Max; 4 holes 0.284 in. Min, 0.297 in. Max counterbored 0.375 in. Dia; 1 hole 0.957 in. Min, 0.977 in. Max dia; 1 hole 0.431 in. Min, 0.444 in. Max counterbored 0.625 in. Dia, 0.140 to 0.155 in. Deep; w/connector 1; material plastic acrylic, mil-p-5425, finish a; 2 holes 0.290 to 0.303 in. Dia