The Simpson Deck-Drive DSV Wood Screw in #10 x 4" with a T25 6-Lobe drive is a load-rated fastening solution engineered specifically for preservative-treated wood decking applications. Finished in a Red Quik Guard coating that blends with natural wood tones, this screw is built to handle the swelling and shrinkage cycles inherent to outdoor lumber - delivering a clean, countersunk appearance and reliable structural performance in exterior decking projects.

Key Features

• Load-rated for shear, pull-through, and withdrawal resistance - provides verified structural performance you can rely on for code-compliant deck builds
• Ribbed flat head with underhead nibs - countersinks smoothly and cleanly into wood deck boards, leaving a finished, professional surface without splitting or tear-out
• Variable Thread Design with High-Low Threaded Tip - optimized thread geometry for dimensional lumber reduces driving torque by up to 35%, extending battery life on cordless tools
• High-Low Threaded Tip with Type-17 point - fast-start tip reduces the need for pre-drilling and speeds up installation in treated wood decking
• Quik Guard corrosion-resistant coating - meets ICC-ES AC257 exposure conditions 1 and 3, making these screws suitable for exterior environments and certain preservative-treated wood applications
• Red color finish - blends naturally with wood decking for an aesthetically clean result that does not draw attention to fastener locations
• T25 6-Lobe drive type - provides positive bit engagement, reducing cam-out and driver slippage during high-volume decking installation
• Shank engineered for wood movement - designed to withstand the natural swelling and shrinkage cycles of wood decking products, maintaining holding strength over time
• T25 6-Lobe driver bit included - installer is ready to work immediately without sourcing a separate bit

Why This Product

• Purpose-built for treated decking - unlike general-purpose wood screws, the DSV is specifically engineered for preservative-treated lumber, with a Quik Guard coating rated under ICC-ES AC257 for outdoor and treated-wood exposure conditions, so you are not guessing at compatibility
• Maximizes battery tool efficiency - the low-torque variable thread design allows up to 35% more screws per battery charge, which meaningfully reduces downtime and tool fatigue on large deck projects
• Delivers a finished appearance without extra steps - the ribbed flat head with underhead nibs countersinks flush and clean in a single pass, eliminating the need for manual countersinking on standard deck boards
• Structural confidence with load ratings - the DSV carries load ratings for shear, pull-through, and withdrawal, giving contractors and homeowners documented fastener performance rather than relying on unrated alternatives

Specifications

• Brand: Simpson Strong-Tie
• Model: DSVR4
• Screw Size: #10
• Length: 4 in.
• Head Diameter: 0.333 in.
• Head Type: Ribbed Flat Head
• Drive Type: T25 6-Lobe
• Thread Type: Variable Thread Design
• Point Type: High-Low Threaded Tip
• Coating/Material: Quik Guard Coating
• Color: Red

Available Pack Options

• DSVR4R1LB: 1 Lb - includes (1) T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVR4R5LB: 5 Lb - includes (1) T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVR4R350: 350 Pk
• DSVR4MB: 1000 Pk - includes (2) T25 6-lobe driver bits (replacement driver bit - BIT25T-2-R2)

Frequently Asked Questions

What type of decking applications are these screws rated for?

The Deck-Drive DSV Wood Screw is a load-rated fastener designed for preservative-treated wood decking applications. Its Quik Guard coating meets ICC-ES AC257 exposure conditions 1 and 3, covering exterior and certain preservative-treated wood environments.

Do I need a special driver bit to install these screws?

These screws use a T25 6-Lobe drive type. A T25 6-Lobe driver bit is included, so no separate bit purchase is required before getting started.

Will these screws handle the natural movement of wood decking over time?

Yes. The DSV shank is specifically engineered to withstand the swelling and shrinkage that is common with wood decking products, helping maintain holding strength as lumber expands and contracts with seasonal moisture changes.

Do I need to pre-drill before driving these screws into deck boards?

The High-Low Threaded Tip with a Type-17 point is designed to provide fast starts in wood decking without requiring pre-drilling in most standard applications. The ribbed flat head with underhead nibs also countersinks cleanly in a single pass.