Simpson Strong-Tie Strong-Drive SDWS Timber Screw – Exterior Grade, 0.220 in x 4 in, T40 Drive (50-Pack)

The Simpson Strong-Tie Strong-Drive SDWS Timber Screw sets a new standard for structural wood fastening. Engineered as a powerful alternative to lag bolts and through-bolting, these screws are designed to deliver exceptional holding power, easy installation, and long-lasting exterior performance.

Featuring a deep 6-lobe T40 star drive that minimizes cam-out and maximizes torque transfer, these screws drive cleanly and securely into wood without the need for washers. The bold thread geometry provides excellent pull-out resistance, and the exterior-grade corrosion-resistant coating ensures durability in outdoor and pressure-treated lumber applications.

Each pack includes 50 screws and a T-40 driver bit for immediate use on the job site.

Whether you’re framing, building decks, installing beams, or creating heavy timber structures, these premium fasteners make installation faster and more reliable.