Aluminum alloy 2024-t351; 0.375 in.L; smaller end 0.280 in.Dia. X 0.245 in.L. With medium knurl 0.180 in. From end; drilled through hole 0.140 in.Dia; larger end 0.280 in.Dia. X 90 degrees countersunk; larger end threaded length 0.130 in. 0.375-24 unf-2a