Simpson Strong-Tie #9 x 1-1/2 in. Strong-Drive SD Connector Screw

The Strong-Drive SD connector screw is specifically designed to replace nails in certain Simpson Strong-Tie connectors and is the only screw approved for that application. The load-rated SD screw has been tested and approved for use in many popular Simpson Strong-Tie products. In connector applications where more control is desired or using a hammer is inconvenient, screws provide an easier installation method while achieving single-fastener load values that exceed those of typical 10d common or 16d common nails. Featuring optimized heat-treating for ductility and strength, this fastener includes an integrated washer to reduce cam-out and a specialized shank designed to fit fastener holes in Simpson Strong-Tie connectors. The mechanical galvanized Class 55 coating provides protection for interior and most exterior conditions, meeting requirements for use in preservative-treated and fire-retardant-treated wood.