Simpson Deck-Drive DWP Wood Screw in #10 x 3-1/2", Type 305 Stainless Steel is a high-performance fastener engineered for decking, dock construction, and demanding exterior wood applications where superior corrosion resistance is essential. With a flat head profile, T25 6-lobe drive, and sharp-point tip, this screw drives cleanly into a wide range of deck board materials - reducing effort and delivering a flush, professional finish. The Type 305 stainless steel construction provides reliable protection against rust and oxidation in outdoor environments, making it a trusted choice for exposed wood structures that face moisture, weathering, and general exterior conditions.

Key Features

• Type 305 Stainless Steel material - delivers strong corrosion resistance for exterior decking, docks, and boardwalk applications exposed to moisture and the elements
• Unique box thread design with raised-ridge technology - greatly reduces driving torque so you can drive more screws on a single battery charge, improving job-site efficiency
• Specially designed sharp point - penetrates hard wood products and dense deck board materials with ease, minimizing pre-drilling requirements
• T25 6-lobe drive - offers a secure bit-to-fastener fit that reduces cam-out, resulting in easier driving and extended bit life
• Flat head profile with 0.335" head diameter - sits flush with the surface for a clean, low-profile appearance on finished deck boards and trim
• 3-1/2" length in #10 screw size - provides sufficient fastening depth for thick deck boards and structural wood connections in general exterior assemblies
• Compatible with wood, engineered wood, and polymer materials - versatile enough for the variety of deck board products used in modern construction

Why This Product

• Built for outdoor exposure without sacrificing ease of use - Type 305 stainless steel provides meaningful corrosion protection for deck, dock, and general exterior applications, while the box thread design keeps driving effort low even in dense wood materials.
• Designed specifically for today's deck board materials - the combination of a sharp point and box threads makes this screw ideally suited for the range of wood and engineered wood products commonly found in deck construction, reducing the chance of splitting or stalling.
• Reduces tool wear and extends battery runtime - the raised-ridge box thread technology lowers torque requirements, meaning less strain on your drill or driver and more screws per charge on larger projects.
• Versatile application range - suitable not only for deck boards but also for fascia, trim, and millwork finishing in exterior settings, giving contractors and DIYers a single reliable fastener across multiple tasks on the same job.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length: 3-1/2 in.
• Material: Type 305 Stainless Steel
• Finish: Type 305 Stainless Steel
• Head Type: Flat Head
• Head Diameter: 0.335 in.
• Drive Type: T25 6-Lobe
• Thread Type: Box Threads
• Point Type: Sharp Point
• Approx. Count Per Lb.: 56
• Color: None
• Country of Origin: Taiwan

Available Pack Options

• S10350WP1: 1 Lb - includes (1) T25 6-lobe driver bit
• S10350WP5: 5 Lb - includes (1) T25 6-lobe driver bit
• S10350WPB: 1000 Pk - includes (2) T25 6-lobe driver bits

Approved Applications

• Decking, docks, and boardwalks
• General exterior wood fastening applications requiring extra corrosion protection
• Fascia and exterior trim installation
• Finishing and millwork in exterior settings
• Wood, engineered wood, and polymer deck board materials

Frequently Asked Questions

What type of stainless steel is this screw made from, and where is it best suited?

This screw is made from Type 305 stainless steel, which provides strong corrosion resistance for deck, dock, and general exterior applications where extra protection against moisture and weathering is needed. For seaside or coastal environments with higher salt exposure, a Type 316 stainless steel version should be considered instead.

What drive bit do I need to install this screw?

This screw uses a T25 6-lobe drive. The 6-lobe design provides a secure fit between the bit and the fastener, which reduces cam-out during installation and helps extend the working life of your drive bit.

What materials is this screw compatible with?

The Deck-Drive DWP Wood Screw is compatible with wood, engineered wood, and polymer materials - making it well suited for the wide variety of deck board products used in modern exterior construction and finishing work.

How does the box thread design benefit installation?

The unique box thread design features raised-ridge technology that greatly reduces the driving torque required to set each screw. This means less strain on your drill or impact driver, fewer stops to swap batteries, and a more efficient installation process - especially on larger decking or dock projects.

Note: Product dimensions and/or thread length may differ from picture.