The Simpson Strong-Tie DCU234S316TN02 Deck-Drive DCU Composite Collated Screw is a #10 x 2-3/4 in. Quik Drive collated screw made for fastening composite deck boards. This is a composite collated screw designed for composite decking installation. Model Number: DCU234S316TN02. If you are building decks in wet, coastal, or high-corrosion environments and need a cleaner finished surface than a general-purpose deck screw usually gives you, this is the kind of fastener worth paying attention to.

What matters here is not just the size or the stainless grade, but how the screw is built to behave in composite. Simpson Strong-Tie uses a tri-lobe thread design to reduce damage to the board while driving, and inverted upper threads to clear excess material so the surface finishes cleaner. That helps cut down on the raised material and rough-looking install points that can show up when composite boards are fastened with the wrong screw geometry. The cap head also helps prevent mushrooming, which is one of the biggest appearance problems on composite decking.

The Type-17 point is there for fast starts and easier penetration into composite decking. On a long run of deck boards, that matters because easier starting means less fighting the screw at the surface and less chance of wandering or tearing up the face of the board. The T20 star drive gives you a more secure bit engagement than a lower-grip recess, which helps when you are driving repeatedly and want less cam-out.

This screw is built from Type 316 stainless steel, which is the spec that makes it stand out for high-exposure installs. If the deck is near saltwater, around chemicals, or in a climate where corrosion resistance is not optional, Type 316 is the right conversation to have. Simpson also calls this out for high to severe levels of corrosion resistance, so this is not just a color-matched screw with deck-friendly geometry. It is also a material choice aimed at long-term outdoor durability.

Because it is a Quik Drive collated screw, this product is aimed at installers who want speed and repeatability on the job. Collated fastening makes the most sense when you are covering a lot of square footage and want a more efficient workflow than handling loose screws one at a time. For deck crews, remodeling contractors, and serious builders doing production-style board fastening, that can mean less downtime and more consistent installation pacing.

The tan 02 color is part of the product's finish matching strategy, which matters on visible deck surfaces where the fastener should blend instead of drawing attention. Simpson also lists this as an approved fastener for Trex composite decking, which is a practical point for anyone trying to stay inside decking manufacturer requirements instead of guessing at compatibility.

This product is best for deck builders, remodelers, and contractors installing composite decking boards or roof sleeper assemblies where appearance, corrosion resistance, and installation speed all matter. If you are just doing a small repair with loose screws, this may be more system-specific than you need. If you are doing full deck builds and want a composite screw designed to leave a cleaner result, this is the right lane.

Simpson Strong-Tie DCU234S316TN02 Deck-Drive DCU Composite Collated Screw for Serious Deck Work

If you are installing composite decking in a place where corrosion and finish quality both matter, this is the kind of screw that earns its keep.

• Who it's for: Deck crews, remodelers, and contractors running composite boards in high-exposure outdoor conditions.
• Why it stands out: Type 316 stainless steel, a composite-friendly thread and head design, and Quik Drive collated format make it much more purpose-built than a generic deck screw.
• Worth knowing: This is a 1000-pack collated product, so it makes the most sense when you are set up for system-based installation and have enough work to justify the format.

• What is this screw designed for? It is designed for fastening composite decking boards and is also listed for fastening roof sleeper assemblies.
• What material is the screw made from? This model is made from Type 316 stainless steel for high corrosion resistance.
• What drive style does it use? It uses a T20 star drive recess.
• Is it approved for Trex composite decking? Yes. Simpson lists it as an approved fastener for Trex composite decking.