This 5/8-11 x 3 A325 Type 1 Heavy Hex Bolt Hot Dipped Galvanized Domestic USA - Bulk Keg (550) is perfect for heavy-duty applications. It is manufactured according to the ASTM A325 standards for structural bolts and is hot-dipped galvanized for increased corrosion resistance. With its high tensile strength, it ensures a secure and strong connection.