7brass, 0.750 in. O/a lg, 0.249 in. Diameter of shank, 1 hole 0.098 in. Diameter through shank and 1 hole 0.098 through hexagon wrenching features, 0.438 in. Width across hexagon, 0.375 @lg of hexagon head, head drilled and tapped no. 10-32 unf-2b threads, 0.312 in. Deep