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The Simpson Strong-Tie Strong-Drive SDS Heavy-Duty Connector Screw is a 1/4\”-diameter structural wood screw designed for a wide range of connector, wood-to-wood, and engineered wood applications. Built for strength and speed, the SDS installs without predrilling thanks to its easy-driving Type-17 point, which reduces splitting while ensuring consistent performance. Tested and approved in multiple structural applications, the SDS screw features a corrosion-resistant double-barrier coating for durability in standard conditions. For harsh or high-exposure environments, this includes a Type 316 stainless steel coating, providing maximum corrosion resistance while delivering the same reliable installation and holding power. With a large 3/8\” hex head and integrated washer, these screws deliver excellent clamping strength and are stamped with the Simpson Strong-Tie sign and fastener length for easy inspection after installation. Key Features Fast, Easy Installation Type-17 point starts quickly and eliminates predrilling in most applications. Coating Options Available with double-barrier coating for durability or Type 316 stainless steel for maximum corrosion resistance. Built-In Clamping Power 3/8\” hex head with 0.500\” washer delivers strong, secure connections. Easy Identification Head stamped with the Simpson Strong-Tie sign and screw length. Driver Bit Included Replacement driver bit available (BITHEXR38-R1).