The Simpson Deck-Drive DCU Composite Screw in #10 x 2-3/4", Type 305 Stainless Steel with Tan 01 color-matching painted heads is engineered by Simpson for reliable, clean, and corrosion-resistant fastening of composite and PVC deck boards. Designed specifically for composite decking applications, this cap-head screw combines a Type-17 point for easy penetration, inverted upper threads that clear away excess material, and a painted head that blends with popular decking manufacturers' colors for a polished, professional appearance. Whether you are building a new deck or replacing boards in a coastal or chloride-rich environment, this stainless-steel composite decking screw delivers secure installation and long-term performance.

Key Features

• Type 305 Stainless Steel material - provides superior corrosion resistance, making this screw especially suited for outdoor deck applications in environments with exposure to chlorides, salt air, or moisture.
• Type-17 point - penetrates composite and PVC decking cleanly without pre-drilling, saving installation time and reducing material stress.
• Inverted upper Tri-Lobe threads - engineered to clear excess composite material during driving, ensuring a flush, clean, and secure fastener seat every time.
• Cap head design with 0.230 in. head diameter - creates a low-profile, consistent surface contact that holds deck boards firmly without crushing composite material.
• T20 6-Lobe drive type - delivers excellent bit engagement and reduces cam-out, giving installers more control and a cleaner drive in composite deck boards.
• Tan 01 color-matching painted head - blends with popular composite decking manufacturers' board colors for a more concealed, professional finished look that enhances the overall appearance of the deck surface.
• 2-3/4 in. length - sized to provide proper penetration depth and holding strength through composite deck boards into structural framing members.

Why This Product

• Purpose-built for composite and PVC decking - unlike generic wood screws, the DCU is specifically engineered with a Type-17 point and inverted upper threads to work with the unique density and material behavior of composite and PVC deck boards, eliminating the need to mix and match different fasteners for different decking types.
• Ideal for chloride-rich and coastal environments - the Type 305 stainless steel finish resists corrosion even in harsh outdoor conditions where standard fasteners would degrade, helping the deck maintain structural integrity and appearance over time.
• Achieves a cleaner, more concealed finish - the Tan 01 color-matched painted cap head is designed to blend with popular decking brand colors, reducing the visual impact of fastener heads on finished deck surfaces for a more professional result.
• Reduces installation effort and rework - the combination of a self-starting Type-17 point, material-clearing Tri-Lobe threads, and a T20 6-Lobe drive means fewer stripped fasteners, less excess material buildup, and a faster, cleaner installation process from start to finish.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length: 2-3/4 in.
• Head Diameter: 0.230 in.
• Head Type: Cap Head
• Drive Type: T20 6-Lobe
• Thread Type: Tri-Lobe Threads
• Point Type: Type-17 Point
• Material: Type 305 Stainless Steel
• Finish: Type 305 Stainless Steel
• Color: Tan 01

Available Pack Options

• DCU234P305TN01: 350 Pk - includes 1 driver bit included
• DCU234MB305TN01: 1750 Pk - includes 2 driver bits included

Approved Applications

• Decks - Deck Boards Composite

Frequently Asked Questions

What type of decking material is the Deck-Drive DCU Composite Screw designed for?

The Deck-Drive DCU is designed for use with all types of composite and PVC decking. Its Type-17 point and inverted upper Tri-Lobe threads are specifically engineered to penetrate and clear excess composite material during installation, making it the purpose-built fastener for composite deck board applications.

Why is Type 305 Stainless Steel used for this composite decking screw?

Type 305 stainless steel provides strong corrosion resistance, making this screw especially well-suited for outdoor decking environments where exposure to moisture or chlorides - such as coastal or poolside settings - could cause standard fasteners to corrode and fail over time.

What driver bit is compatible with the T20 6-Lobe drive on this screw?

The Deck-Drive DCU uses a T20 6-Lobe drive. A compatible replacement driver bit is available - see the Related Products section below for the BIT20T-2-R2 driver bit.

How does the Tan 01 color-matching painted head work with composite decking brands?

The Tan 01 painted cap head is designed to blend with popular composite decking manufacturers' board colors. A Composite-Decking Color Cross-Reference chart is available in the Downloads and Resources section below to help match the correct head color to specific decking brands, enabling a more concealed and professional finished appearance.

Downloads and Resources

• Composite-Decking Color Cross-Reference chart

Related Products

• - Compatible T20 6-Lobe driver bit
• Deck-Drive Screw Plug Solution - Color-matching DCU screw plugs for a concealed finish