Simpson #7 x 2-1/2" 305 Stainless Steel Deck-Drive DWP Wood Screw with T15 Trim Head is a premium exterior fastener engineered by Simpson for deck construction, dock installations, boardwalks, and general outdoor wood applications where superior corrosion protection is essential. Featuring a low-profile trim head and Type 305 stainless steel construction, this wood screw delivers a clean, finished appearance while standing up to the demands of moisture-exposed environments. The combination of a specially designed sharp point and unique box-thread geometry makes this fastener an ideal choice for securing the wide range of wood and engineered wood products used in modern deck boards, fascia, and trim work.

Key Features

• Type 305 Stainless Steel material - provides enhanced corrosion resistance for exterior, deck, dock, and outdoor environments where standard fasteners would deteriorate prematurely.
• Unique box-thread design with raised-ridge technology - greatly reduces driving torque, meaning you can drive more screws per battery charge and experience less fatigue on large projects.
• Specially designed sharp point - penetrates hard wood products with ease, eliminating the need for pre-drilling in most applications and speeding up installation.
• Low-profile trim head (0.230 in. head diameter) - sits flush or nearly flush for a neat, finished look on visible deck boards, fascia, and millwork applications.
• T15 6-Lobe drive - offers a secure bit-to-screw fit that reduces cam-out, resulting in easier driving and extended bit life over long runs.
• Box-thread geometry suited to today's deck boards - ideally matched to the majority of softwood and engineered wood materials used in residential and commercial decking, reducing the risk of splitting.
• 2-1/2 in. length at #7 screw size - provides reliable holding depth for deck board and trim fastening without overdriving or mushrooming the wood surface.

Why This Product

• Built for corrosion-demanding outdoor environments - Type 305 stainless steel construction is specifically suited for deck, dock, and exterior wood applications where moisture exposure would cause standard steel fasteners to rust and stain the wood surface over time.
• Reduces installation time and battery consumption - the raised-ridge box-thread technology lowers driving torque, so crews can complete more fastening per charge and maintain pace on large decking and boardwalk projects.
• Versatile across wood, engineered wood, and polymer materials - the sharp point and box-thread combination accommodates the broad range of substrates found in modern decking and trim applications without switching fastener types.
• Clean aesthetic for visible trim and fascia work - the small-diameter trim head keeps the fastener discreet on finished surfaces, making it a practical choice not just for structural decking but also for finishing, millwork, and trim installations.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #7
• Length: 2-1/2 in.
• Head Type: Trim Head
• Head Diameter: 0.230 in.
• Drive Type: T15 6-Lobe
• Thread Type: Box Threads
• Point Type: Sharp Point
• Material: Type 305 Stainless Steel
• Finish: Type 305 Stainless Steel
• Color: None
• Approx. Count Per Lb.: 121
• Country of Origin: Taiwan

Available Pack Options

• S07250WP1: 1 Lb - includes (1) T15 6-lobe driver bit
• S07250WPP: 350 Pk - includes (1) T15 6-lobe driver bit
• S07250WP5: 5 Lb - includes (1) T15 6-lobe driver bit
• S07250WPB: 1750 Pk - includes (2) T15 6-lobe driver bits

Approved Applications

• Deck board fastening and deck construction
• Dock and boardwalk installations
• General exterior wood fastening where extra corrosion protection is needed
• Fascia and trim fastening
• Finishing and millwork applications
• Engineered wood and polymer decking materials

Frequently Asked Questions

What type of drive bit does this screw require?

This screw uses a T15 6-Lobe drive. The 6-lobe interface provides a secure bit fit that reduces cam-out during driving, extending bit life and making installation easier over long runs.

Is this screw suitable for use with engineered wood and polymer decking?

Yes. The DWP Wood SS screw is designed for use with wood, engineered wood, and polymer materials, making it compatible with the broad range of deck board products available today.

Why is Type 305 stainless steel specified for this screw?

Type 305 stainless steel provides enhanced corrosion resistance, making these screws well suited for deck, dock, and outdoor applications where exposure to moisture would cause standard steel fasteners to rust and stain the surrounding wood.

What is the advantage of the trim head design on this screw?

The trim head has a small 0.230 in. diameter, which allows it to sit low and discreetly on the surface of deck boards, fascia, and millwork - making it a practical choice for applications where the finished appearance of the fastened surface matters.

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