The Simpson Deck-Drive DCU Composite Screw in #10 x 2-3/4", Tan is a purpose-built fastener from Simpson designed specifically for composite and PVC deck board installations. Featuring a Quik Guard coating for medium-level corrosion resistance, this screw delivers a clean, professional finish with color-matching painted heads that blend seamlessly with popular composite decking products. Whether you are installing a new deck or replacing worn fasteners, the DCU composite screw combines ease of installation with reliable holding strength and a finished appearance that elevates the look of any outdoor decking project.

Key Features

• Quik Guard Coating - provides medium-level corrosion resistance, making this screw a dependable choice for outdoor composite and PVC decking exposed to the elements
• Type-17 Point - self-piercing tip penetrates composite decking without pre-drilling, speeding up installation and reducing prep time on the job
• Inverted Upper Tri-Lobe Threads - engineered to clear excess material as the screw seats, resulting in a clean, flush installation with no raised ridges or surface debris
• Cap Head with 0.230 in. Head Diameter - wide bearing surface distributes load evenly across the decking surface for a secure, stable hold
• T20 6-Lobe Drive Type - the 6-lobe drive interface reduces bit slippage and cam-out, giving installers better torque control and a more efficient drive experience
• Tan Color with Painted Head - color-matching finish blends with popular composite decking manufacturers' products for a concealed, professional appearance
• Carbon Steel Construction - provides the structural integrity needed to fasten composite and PVC deck boards firmly and consistently

Why This Product

• Designed from the ground up for composite and PVC decking - the Type-17 point and inverted upper threads work together to eliminate common installation problems like raised material, cracking, or uneven seating that can occur with general-purpose screws
• The tan painted cap head matches popular decking colors so the fastener nearly disappears into the board surface, delivering the clean, finished look that composite decking is valued for
• Quik Guard coating resists medium levels of corrosion, making these screws suitable for outdoor deck applications where moisture and weather exposure are ongoing concerns
• The T20 6-Lobe drive design reduces cam-out and bit wear, so installers can drive more screws accurately with less effort - a practical advantage on large decking projects

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
• Coating/Finish: Quik Guard Coating
• Color: Tan

Available Pack Options

• DCU234TNR70: 70 Pk - includes 1 driver bit included
• DCU234TNR350: 350 Pk - includes 1 driver bit included
• DCU234TNMB: 1750 Pk - includes 2 driver bits included

Approved Applications

• Decks - Deck Boards Composite

Frequently Asked Questions

What type of decking material is this screw designed for?

The Deck-Drive DCU Composite Screw is engineered specifically for all types of composite or PVC decking. It is not intended as a general-purpose wood screw - it is optimized for the density and material characteristics of manufactured composite deck boards.

Does this screw require pre-drilling before installation?

No pre-drilling is required. The Type-17 point is a self-piercing tip that penetrates composite decking directly, saving time and eliminating the need for an extra preparation step during installation.

What driver bit does this screw use, and is there a compatible replacement bit?

This screw uses a T20 6-Lobe drive. A compatible replacement driver bit is available - see the Related Products section below for the recommended bit. The 6-lobe interface is designed to reduce cam-out and extend bit life compared to standard drive types.

Are there color-matching plug options available to further conceal the screw heads?

Yes. The Deck-Drive DCU Composite Screw is compatible with color-matching DCU Screw Plugs. See the Related Products section below for the Deck-Drive Screw Plug Solution, which allows you to cover installed screw heads for an even cleaner deck surface appearance.

Downloads and Resources

• Composite-Decking Color Cross-Reference Chart

Related Products

• BIT20T-2-R2 - Compatible T20 6-Lobe replacement driver bit
• Deck-Drive Screw Plug Solution - Color-matching screw plugs compatible with DCU Composite Screws