Simpson Deck-Drive DSV Wood Screw - #8 x 1-5/8 in., Black, T25 Drive by Simpson Strong-Tie is a purpose-built fastening solution engineered for preservative-treated wood decking applications. Featuring a rimmed flat head with underhead nibs and a high-low threaded point, this black screw countersinks cleanly and securely into today's wood deck boards, delivering a finished appearance without splitting or surface damage. The variable thread design and robust shank construction accommodate the natural swelling and shrinkage of fast-growth lumber, making these screws a reliable choice for outdoor decking, fencing, furniture, and wood-to-wood connections of all kinds.

Key Features

• Quik Guard Coating - provides corrosion resistance for exterior and preservative-treated wood applications, keeping fasteners secure and rust-resistant in demanding outdoor conditions
• Rimmed Flat Head with Underhead Nibs - countersinks easily and cleanly into wood deck boards, producing a smooth, finished surface that eliminates the need for additional surface prep
• High-Low Threaded Point - delivers fast starts and reduces the force required to drive each screw, improving efficiency and reducing installer fatigue across large decking projects
• Variable Thread Design - engineered to accommodate the swelling and shrinkage common in fast-growth dimensional lumber, maintaining holding power through seasonal wood movement
• T25 6-Lobe Drive - reduces cam-out and provides positive bit engagement for cleaner, more controlled driving, especially at awkward angles or when working overhead
• Black Finish - blends with composite and dark-toned decking materials for a clean, low-profile appearance on visible deck surfaces and trim applications
• Includes T25 6-Lobe Driver Bit - ready to drive right out of the package, with the correct bit included so you can begin fastening without hunting for compatible accessories

Why This Product

• Specifically designed for preservative-treated decking - the Quik Guard coating and variable thread shank address the two most common fastener failure points in outdoor wood decks: corrosion and loosening from wood movement
• The fast-start, high-low threaded point means faster installation with fewer pre-drilling steps, reducing labor time on large decking, fencing, or railing infill projects
• The black color and clean countersinking head make these screws a practical choice for visible guard rail infill, fascia, and trim applications where appearance matters as much as performance
• Versatile enough for furniture, fencing, and general DIY wood-to-wood fastening - a single screw type that covers a wide range of residential and light commercial applications

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length: 1-5/8 in.
• Head Diameter: 0.330 in.
• 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: 159
• Country of Origin: Taiwan

Available Pack Options

• DSVBK158R160: 160 Pk - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVBK158R480: 480 Pk - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVBK158R480 -3: 1440 Pk - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)

Approved Applications

• Fastening Wood-to-Wood
• Decks - Guard Rail Infill
• DIY/Home Projects
• Fencing
• Furniture

Frequently Asked Questions

What type of wood applications are these screws designed for?

The Deck-Drive DSV Wood Screw is designed primarily for preservative-treated decking applications, including wood deck boards, guard rail infill, fascia, and trim. It is also suitable for general wood-to-wood fastening in fencing, furniture, and DIY home projects.

What drive bit is required, and is one included?

These screws require a T25 6-lobe driver bit. A T25 6-lobe driver bit is included with your purchase. If you need a replacement, the compatible bit is identified as BIT25T-2-R2.

How does the Quik Guard coating protect these screws in outdoor conditions?

The Quik Guard coating provides corrosion resistance specifically suited for exterior applications and certain preservative-treated wood environments. This makes the screws appropriate for outdoor decks and other exposed installations where long-term durability against moisture and wood treatment chemicals is important.

Why is a variable thread design important for deck board fastening?

Wood deck boards - especially those made from fast-growth lumber - naturally expand and contract with changes in moisture and temperature. The variable thread design on the DSV screw is engineered to handle this movement, helping the fastener maintain its holding power and reducing the risk of loosening or surface cracking over time.