Aluminum alloy, qq-a-225/6, anodized, 1.20 in. O/a dia, 0.875in. Lg, 0.420 in. Id, 5/8-18 unf-3a thd, four 0.032 in. Diameter lock wireholes spaced 90 degrees apart, 0.90 in. Diameter of circular ring on head, four wrench slots 0.080 in. W located 90 degrees apart on circular ring
