Simpson Deck-Drive DWP Wood Screw in Type 305 Stainless Steel by Simpson is a high-performance fastener engineered for decking, dock construction, and general exterior wood applications where reliable corrosion resistance is essential. Built with a uniquely designed sharp point and proprietary box-thread profile, this #8 x 3" flat-head screw drives cleanly into the widest range of deck board materials - including solid wood, engineered wood, and polymer - while the T20 6-lobe drive delivers a secure, slip-free connection between bit and fastener for faster, more consistent installation.

Key Features

• Type 305 Stainless Steel material - provides elevated corrosion resistance for outdoor, wet, and high-humidity environments such as decks, docks, and boardwalks, far outlasting standard zinc-plated fasteners in exterior exposure conditions.
• Unique box-thread design with raised-ridge technology - greatly reduces driving torque so you can drive more screws per battery charge, lowering fatigue and increasing jobsite efficiency.
• Specially designed sharp point - penetrates hardwood deck board products with ease, eliminating the need for pre-drilling in most wood and engineered wood applications.
• T20 6-lobe drive recess - creates a secure, positive bit-to-screw engagement that minimizes cam-out, extends bit life, and keeps installation moving without constant bit replacements.
• Flat head profile with 0.335 in. head diameter - sits flush with or slightly below the deck surface for a clean, snag-free finished appearance on exposed decking and trim.
• 3" length in #8 diameter - delivers proper penetration depth for typical deck board-to-framing connections without overdriving or splitting thinner boards.
• Compatible with wood, engineered wood, and polymer materials - one fastener handles the variety of materials found on modern decks, docks, and exterior trim installations.

Why This Product

• Built for exterior durability where corrosion is a real concern - Type 305 stainless steel construction stands up to moisture, humidity, and the demanding conditions of decks and dock environments, reducing the risk of fastener failure and staining over time.
• Engineered to work smarter on battery-powered tools - the box-thread design actively reduces driving torque, meaning your drill or impact driver does less work per screw, extending run time and reducing operator fatigue on large decking projects.
• Versatile enough for deck boards, fascia, and trim - the DWP is available in sizes suited for both structural deck board fastening and finishing applications like fascia and trim, making it a practical single-brand solution for an entire exterior project.
• Sharp point eliminates pre-drilling in most applications - saves significant time on installations involving hardwood or dense engineered wood deck products, keeping the workflow moving without the extra step of pilot holes.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length: 3 in.
• Head Type: Flat Head
• Head Diameter: 0.335 in.
• Drive Type: T20 6-Lobe
• Thread Type: Box Threads
• Point Type: Sharp Point
• Finish: Type 305 Stainless Steel
• Material: Type 305 Stainless Steel
• Approx. Count per Lb.: 82
• Country of Origin: Taiwan

Available Pack Options

• S08300WPF1: 1 Lb - includes (1) T20 6-lobe driver bit
• S08300WPF5: 5 Lb - includes (1) T20 6-lobe driver bit
• S08300WPFB: 1750 Pk - includes (2) T20 6-lobe driver bits

Approved Applications

• Deck board fastening to wood and engineered wood framing
• Dock and boardwalk construction requiring corrosion-resistant fasteners
• General exterior wood assembly in high-moisture environments
• Fascia and exterior trim installation
• Polymer deck board fastening

Frequently Asked Questions

What type of bit does the Deck-Drive DWP Wood Screw require?

This screw uses a T20 6-lobe drive recess. A T20 driver bit is required for installation. The 6-lobe design creates a tight bit-to-screw interface that reduces cam-out and extends bit service life compared to Phillips or square-drive configurations.

Can this screw be used with composite or polymer deck boards?

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

Is Type 305 stainless steel appropriate for coastal or seaside installations?

Type 305 stainless steel provides strong corrosion resistance for decks, docks, and general exterior applications. For seaside and coastal environments with direct saltwater exposure, Simpson recommends upgrading to Type 316 stainless steel fasteners for maximum protection in those more aggressive conditions.

Does this screw require pre-drilling in hardwood deck boards?

No pre-drilling is required in most cases. The specially designed sharp point is engineered to penetrate hardwood and dense wood products directly, which streamlines installation and reduces the number of steps needed to complete a decking project.

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