Best-in-class, load-tested fasteners; Strong-Drive structural fasteners are engineered and extensively tested to efficiently meet your most demanding wood and metal applications. Stronger can also be faster. The Strong-Drive family is designed to install easier than other fastening methods, which saves time and money. Simpson Strong-Tie Connector nails are the best choice for Simpson Strong-Tie connectors Head ID stamp for easy identification Smooth shank Smooth head Length: 3-in Shank diameter: 0.148 in. Head diameter: 0.31 in. Hot-dip galvanized, Class D coating meets the requirements of ASTM A153, Class D and provides a medium-level of corrosion resistance Quantity: 250