Simpson Strong-Tie SWD18312DBB-R50

Designed for stealth, strength and speed, the Simpson Strong-Tie® Strong-Drive® SWD Double-Threaded™ screw is ideal for securing two wood members together on exterior or interior structural jobs. Available in an assortment of lengths, this innovative fastener can be used in a variety of applications such as knee bracing, fastening beams to posts, beams to joists, or guardrails to posts with ease. The screw features a chisel tip for reduced splitting, a smooth, unthreaded mid-shank to secure wood members tight, and a compact head for low visibility. Code listed for structural applications, the SWD™ screw has a black, exterior-grade, double-barrier coating for corrosion resistance.