Simpson Deck-Drive DSV Wood Screw - #10 x 3-1/2" in Red with Quik Guard Coating is a purpose-built fastener from Simpson Strong-Tie designed for preservative-treated decking, dock and boardwalk construction, and general wood-to-wood framing applications. The red color-matched finish helps these screws blend naturally with wood deck boards, while the Quik Guard coating delivers corrosion resistance suited to exterior and chemically treated lumber environments. Whether you are building a backyard deck, installing guard rail posts, or securing fascia and trim, the DSV screw combines a fast-start tip with a variable thread design to drive smoothly and countersink cleanly without splitting or surface damage.

Key Features

• Rimmed Flat Head with Nibs - the under-head nibs bite into the wood surface as the screw is driven, allowing the head to countersink cleanly and flush for a finished, professional appearance on exposed deck boards.
• High-Low Threaded Point - alternating thread heights reduce driving resistance and provide fast starts, meaning less effort per fastener and faster installation across large decking projects.
• Variable Thread Design - the shank geometry is engineered to flex with the natural swelling and shrinkage of fast-growth and preservative-treated lumber, reducing the risk of surface cracking or fastener push-out over time.
• T25 6-Lobe Drive Type - the 6-lobe interface transfers torque efficiently and resists cam-out, giving installers better bit engagement and more consistent drives even in awkward positions.
• Quik Guard Coating - provides corrosion resistance for exterior applications and compatibility with certain preservative-treated wood products, making these screws a reliable choice for outdoor decks, docks, and boardwalks exposed to moisture.
• Red Color - color is matched to complement natural wood tones on deck surfaces, creating a cleaner visual result compared to silver or bright zinc fasteners.
• #10 x 3-1/2" Sizing - the length and diameter are optimized for fastening deck boards to joists, securing railing posts, and general framing tasks where a strong, deep bite into dimensional lumber is required.

Why This Product

• Designed specifically for preservative-treated and fast-growth lumber - the variable thread shank is built to handle the dimensional movement common in wood decking, reducing the long-term risk of fastener failure, board cupping, or surface lifting that can occur with standard screws.
• Compatible with the Simpson Strong-Tie Quik Drive auto-feed system - DSV screws are available in collated strips for use with the Quik Drive system, which means high-volume deck installations can be completed significantly faster than with hand-drive-only fasteners.
• Corrosion resistance for outdoor and treated-wood environments - the Quik Guard coating is formulated to perform in exterior exposure conditions, making these screws appropriate for decks, docks, boardwalks, and other structures where moisture and chemical treatment are ongoing concerns.
• Versatile across multiple deck and framing applications - from deck boards and fascia to guard rail posts and railing post-to-deck framing connections, a single screw type handles a broad range of common deck construction tasks, simplifying fastener selection and jobsite inventory.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length: 3-1/2 in.
• Head Diameter: 0.330 in.
• Head Type: Rimmed Flat Head with Nibs
• Drive Type: T25 6-Lobe
• Thread Type: Variable Thread Design
• Point Type: High-Low Threaded Point
• Coating: Quik Guard Coating
• Finish: Quik Guard Coating
• Color: Red
• Approximate Count Per Lb: 66

Available Pack Options

• DSVR312R1LB: 1 Lb - includes (1) T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVR312R5LB: 5 Lb - includes (1) T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVR312R350: 350 Pk - includes (1) T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVR312MB: 1000 Pk - includes (2) T25 6-lobe driver bits (replacement driver bit - BIT25T-2-R2)

Approved Applications

• Fastening Wood-to-Wood
• DIY/Home Projects
• Decks - Deck Boards Wood
• General Framing
• Decks - Guard Rail Post to Deck
• Dock and Boardwalk
• Furniture
• Decks - Railing Post-to-Deck Framing

Frequently Asked Questions

What type of coating do these screws use, and is it suitable for pressure-treated lumber?

These screws feature Simpson's Quik Guard Coating, which provides corrosion resistance for exterior applications and compatibility with certain preservative-treated wood products. This makes them appropriate for outdoor deck, dock, and boardwalk construction where treated lumber and moisture exposure are common.

Why does the head design include nibs under the head?

The Rimmed Flat Head with Nibs is designed so the nibs engage the wood surface as the screw is driven down, allowing the head to countersink cleanly and sit flush. This produces a neat, finished appearance on exposed deck boards without requiring pre-drilling for countersinking.

Can these screws be used with an auto-feed screw driving system?

Yes. DSV screws are available in collated strips for use with the Simpson Strong-Tie Quik Drive auto-feed screw driving system, in addition to standard hand-drive use. This makes them well suited for high-volume decking installations where speed and consistency are priorities.

What does the Variable Thread Design do for wood decking applications?

The Variable Thread Design is specifically engineered to accommodate the swelling and shrinkage that is common with fast-growth lumber and preservative-treated wood. This thread geometry helps maintain holding strength over time as the lumber moves seasonally, reducing the likelihood of boards lifting or fasteners loosening.