Simpson Deck-Drive DSV #8 x 1-5/8" Tan Wood Screw with T25 6-Lobe Drive is a high-performance fastening solution engineered by Simpson Strong-Tie specifically for preservative-treated wood decking applications. Designed with an underhead nib profile and a fast-start high-low threaded tip, these tan-colored screws countersink cleanly and flush into wood deck boards for a finished, professional appearance. The variable thread shank design accommodates the natural swelling and shrinkage of fast-growth dimensional lumber, making it a reliable choice for outdoor deck construction, guard rail infill, fencing, and DIY home projects alike. A Quik Guard coating provides corrosion resistance suited to exterior and certain preservative-treated wood environments, and the tan color blends naturally with most wood decking tones.

Key Features

• Quik Guard Coating - provides corrosion resistance for exterior conditions and certain preservative-treated wood applications, helping screws hold up in harsh outdoor environments over time.
• Rimmed Flat Head with Underhead Nibs - countersinks cleanly and easily into wood deck boards, leaving a flush, finished surface without unsightly raised fastener heads.
• Variable Thread Design at 5-3/4 TPI - optimized for dimensional lumber to reduce torque during driving, meaning you can drive more screws per battery charge and work more efficiently on large decking projects.
• High-Low Threaded Point - delivers fast starts and reduces splitting at board ends, speeding up installation while protecting the integrity of the wood.
• T25 6-Lobe Drive Type - provides excellent bit-to-screw engagement, reducing cam-out and giving the installer more control and driving power compared to standard drive styles.
• Tan Color - blends with common wood deck board tones for a clean, low-visibility fastener appearance that keeps the focus on the decking surface.
• Designed for Swelling and Shrinkage - the shank geometry is engineered to withstand dimensional movement common in fast-growth lumber, helping maintain a tight, lasting connection through seasonal changes.
• T25 6-Lobe Driver Bit Included - you can get started immediately without hunting for additional accessories, reducing setup time on the job site.

Why This Product

• Specifically engineered for preservative-treated wood decking - the Quik Guard coating and variable thread design work together to handle the chemical exposure and wood movement that standard screws are not built to manage.
• The rimmed flat head with nibs countersinks without pre-drilling in most applications, saving significant time on large deck builds and DIY projects where hundreds of fasteners are driven.
• The high-low threaded tip creates fast, clean starts that reduce the chance of slipping or wandering, especially important when fastening guard rail infill and fascia trim where precision matters.
• Versatile enough to handle wood-to-wood fastening across decks, fencing, furniture, and trim applications - one screw for multiple project needs reduces the number of fastener SKUs you need to stock and manage.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length: 1-5/8 in.
• Head Type: Rimmed Flat Head with Nibs
• Head Diameter: 0.330 in.
• Drive Type: T25 6-Lobe
• Thread Type: Variable Thread Design
• TPI: 5-3/4
• Point Type: High-Low Threaded Point
• Coating: Quik Guard Coating
• Color: Tan
• Approx. Count Per Lb: 159
• Country of Origin: Taiwan

Available Pack Options

• DSVT158R160: 160 Pk - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVT158R1LB: 1 Lb - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVT158R350: 350 Pk - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVT158R5LB: 5 Lb - includes T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVT158MB: 1750 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

Are these screws compatible with preservative-treated lumber?

Yes. The Quik Guard coating on these Deck-Drive DSV screws is designed to provide corrosion resistance for exterior conditions and certain preservative-treated wood applications, making them well-suited for outdoor deck boards and similar treated lumber environments.

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

The high-low threaded point is designed for fast starts, and the rimmed flat head with nibs is engineered to countersink cleanly into wood deck boards without requiring pre-drilling in most applications. This helps speed up installation on both DIY and professional decking projects.

Why does this screw use a variable thread design?

The variable thread design is optimized for dimensional lumber, particularly fast-growth wood that tends to swell and shrink seasonally. This thread geometry helps the screw shank withstand that movement while maintaining holding power, and it also reduces driving torque so more screws can be driven on a single battery charge.

What drive bit does this screw use, and is it included?

These screws use a T25 6-lobe drive, which provides strong bit-to-screw engagement and reduces cam-out during driving. A T25 6-lobe driver bit is included. If you need a replacement, the compatible replacement driver bit is the BIT25T-2-R2.