Crown Bolt 07430 1/2 Inch-13 x 7 Inch Coarse Thread Hot Dipped Galvanized Steel Carriage Bolts, 25-Count Galvanized 1/2 inch-13 x 7 inch carriage bolt coarse USS For general applications 1/2 inch-13 body diameter and thread pitch 7-inch fastener length Galvanized finish with Rust-Oleum certified rust protection