Crown Bolt 80980 05920 1/2-Inch by 4-1/2-Inch Hex Bolt Coarse Thread Hot Dipped Galvanized, 15-Pack Galvanized 1/2-Inch X 4-1/2-Inch Hex Bolt Coarse USS For General Applications 1/2-Inch Body Diameter And Thread Pitch 4-1/2-Inch Fastener Length Galvanized Finish