Shop

Simpson Strong-Tie SDWS Exterior Grade Timber Screws are engineered for high-strength structural wood-to-wood and engineered wood (EWP) connections. Designed for demanding outdoor applications, these screws deliver the holding power and durability professionals rely on when building decks, pergolas, framing systems, and other load-bearing structures.

The tan coated finish is specifically developed to provide superior corrosion resistance in exterior environments while blending seamlessly with treated lumber for a clean, professional appearance. Featuring a patented thread design and optimized tip geometry, SDWS screws drive fast, reduce splitting, and eliminate the need for pre-drilling in most applications. Whether you’re working with solid sawn lumber or engineered wood products, these screws provide a secure, code-recognized fastening solution built for long-term performance.

Key Features:

• Exterior-Grade Tan Coating: Provides strong corrosion resistance for outdoor and treated lumber applications while offering a clean, low-visibility finish.
• High-Strength Structural Design: Engineered for load-rated wood-to-wood and wood-to-EWP connections in structural applications.
• Patented Thread Technology: Delivers superior holding power and improved withdrawal resistance.
• Fast Installation: Sharp point and aggressive threads reduce the need for pre-drilling and drive quickly with less effort.
• Reduced Splitting: Optimized tip and shank design minimize wood splitting, even near edges.
• Code Listed: Recognized for structural use, making it suitable for professional and engineered builds.

Applications:

• Structural wood-to-wood connections
• Wood to engineered wood product (EWP) fastening
• Deck framing and ledger attachments
• Timber framing and general construction
• Pergolas, pavilions, and outdoor structures
• Replacement for traditional lag screws in many applications

Installation:

• Install using a compatible high-torque drill or impact driver with the recommended driver bit
• No pre-drilling required in most wood applications, saving time on the jobsite
• Drive screws flush with the material surface without overdriving
• Follow applicable building codes and load requirements for structural connections
• Always reference manufacturer guidelines for specific spacing and edge distance requirements