Matl al qq-a-200/8, tem t6510; finish anodize per mil-a-8625, type 1, cl 1; dimensions 0.500 in. Diam by 0.500 l; hole centered drilled through 0.250 in. Diam; one end removed outside 0.300 l by 0.062 in. ; 4 holes perpendicular to each other on cut out portion 0.125 in. Diam