Simpson Deck-Drive DSV Wood Screw - #10 x 3 in., Black by Simpson Strong-Tie is a high-performance fastening solution engineered specifically for preservative-treated wood decking applications. The black Quik Guard coating blends seamlessly with dark deck boards while providing corrosion resistance suited for exterior conditions. Whether you are installing deck boards, securing railing posts, or fastening dock and boardwalk lumber, this screw's variable thread design and high-low threaded point are purpose-built to drive cleanly and countersink flush - leaving a professional, finished surface every time.

Key Features

• Quik Guard Coating in Black - provides corrosion resistance for exterior and preservative-treated wood applications, and the black color blends with dark-stained or composite-adjacent deck boards for a clean aesthetic.
• Rimmed Flat Head with Underhead Nibs - the nibs shear into the wood surface as the screw seats, countersinking effortlessly and delivering a smooth, finished appearance without pre-drilling a countersink.
• Variable Thread Design with High-Low Threaded Point - the alternating thread pattern reduces driving torque, which means fewer battery charges consumed per job and faster overall installation on dimensional lumber and fast-growth wood.
• Optimized Shank Geometry - designed to handle the swelling and shrinkage common in fast-growth lumber and pressure-treated deck boards, reducing the risk of board lifting or surface cracking over time.
• T25 6-Lobe Drive - provides superior bit engagement compared to Phillips or square drives, minimizing cam-out and giving the installer better control during high-torque driving in dense or treated lumber.
• Fast-Start Tip - the high-low threaded point bites quickly into wood without slipping, making one-handed starts practical and speeding up repetitive decking installations.
• #10 Screw Size, 3 in. Length, 0.330 in. Head Diameter - proportioned for standard deck board thickness and framing depths, with head dimensions sized to seat flush without over-driving.
• Includes a T25 6-Lobe Driver Bit - the correct bit ships with the screws, so installation can begin immediately without hunting for a separate tool accessory.

Why This Product

• Built for treated lumber environments - the Quik Guard coating is formulated for corrosion resistance in exterior conditions and certain preservative-treated wood applications, making these screws a dependable choice for decks, docks, and boardwalks exposed to moisture and chemicals.
• Reduces installer fatigue on large deck projects - the low-torque variable thread design allows significantly more screws to be driven per battery charge, which matters when fastening hundreds of deck boards in a single session.
• Versatile enough for deck boards, fascia, trim, and railing posts - the DSV screw line is sized to handle multiple decking tasks beyond just field boards, including guard rail post connections and railing post-to-deck framing, reducing the number of different fasteners needed on a single job.
• Clean, professional countersink without extra steps - the underhead nibs drive flush on contact, eliminating the need for a separate countersinking operation and delivering a finished look directly from the driver.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length (in.): 3
• Head Diameter (in.): 0.330
• Head Type: Rimmed Flat Head with Nibs
• Drive Type: T25 6-Lobe
• Thread Type: Variable Thread Design
• TPI: Variable
• Point Type: High-Low Threaded Point
• Coating: Quik Guard Coating
• Finish: Quik Guard Coating
• Color: Black
• Approx. Count Per Lb: 76
• Country of Origin: Taiwan

Available Pack Options

• DSVBK3R70: 70 Pk - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVBK3R210: 210 Pk - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVBK3R210 -3: 630 Pk - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)

Approved Applications

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

Frequently Asked Questions

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

These screws feature the Simpson Quik Guard Coating, which is formulated to provide corrosion resistance for exterior applications and certain preservative-treated wood conditions. They are specifically marketed for preservative-treated decking applications including deck boards, dock framing, and boardwalk construction.

What driver bit is needed, and is one included?

These screws require a T25 6-lobe (Torx-style) driver bit. A T25 6-lobe driver bit is included with the screws. If a replacement is needed, the compatible replacement bit is model BIT25T-2-R2.

Why does the variable thread design matter for deck installations?

The variable thread design reduces the torque required to drive each screw, which has two practical benefits: it extends battery runtime so more screws can be driven per charge, and it reduces stress on the wood fibers - an important consideration when working with fast-growth lumber that is prone to splitting or surface damage from high-torque fasteners.

Can these screws be used for fascia and trim in addition to deck boards?

Yes. According to Simpson Strong-Tie, the DSV screw line is offered in a variety of sizes suited for fastening fascia and trim in addition to its primary use on wood deck boards and railing post-to-deck framing connections.