Simpson Strong-Drive CSV Construction Screw, #10 x 2-1/2", Yellow-Zinc Coated is a versatile, multi-purpose fastening solution engineered for a wide range of interior wood and engineered-wood applications. Featuring a rimmed flat head with underhead nibs, a low-torque variable thread design, and a fast-start high-low threaded point, this construction screw drives effortlessly and countersinks cleanly into dimensional lumber, OSB, plywood, and other engineered-wood materials - delivering a professional, flush finish every time. The yellow-zinc coating provides corrosion resistance suited to interior environments, making these screws a reliable choice for general-purpose wood-to-wood fastening projects.

Key Features

• Yellow-Zinc Coated Finish - provides corrosion resistance for interior wood and engineered-wood applications, helping fasteners hold up over time in protected environments.
• Rimmed Flat Head with Underhead Nibs - countersinks easily into wood surfaces for a clean, flush, finished appearance without additional prep work.
• Variable Thread Design (High-Low Threaded Point) - low-torque threads allow up to 35% more screws to be driven on a single battery charge, reducing fatigue and extending tool battery life on the job.
• High-Low Thread with Fast-Start Point - provides fast starts and secure engagement in dimensional lumber and engineered-wood materials, reducing drive time and minimizing the risk of cam-out.
• T25 6-Lobe Drive Type - the six-lobe socket interface maximizes torque transfer and reduces bit slippage, giving installers better control and a more efficient drive.
• #10 x 2-1/2" Size - a practical, widely used fastener size optimized for interior wood-to-wood and wood-to-engineered-wood connections in framing, finish, and general construction work.

Why This Product

• Drives faster with less battery drain - the low-torque variable thread design is engineered to reduce resistance during driving, which Simpson states allows up to 35% more screws per battery charge - a meaningful advantage on high-volume interior fastening jobs.
• Engineered for today's building materials - the optimized thread geometry and high-low point are specifically designed to perform in both traditional dimensional lumber and modern engineered-wood products like LVL, OSB, and plywood, making this screw a single solution across multiple substrates.
• Clean countersinking without extra steps - the rimmed flat head with nibs pulls the screw flush with the surface automatically, eliminating the need for pre-drilling a countersink and saving time on appearance-critical interior applications.
• T25 6-Lobe interface for controlled, slip-resistant driving - the six-lobe drive design keeps the bit firmly engaged throughout the drive cycle, reducing the stripped heads and surface damage that commonly occur with Phillips-style fasteners in high-speed driving situations.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length: 2-1/2 in.
• Head Type: Rimmed Flat Head with Nibs
• Head Diameter: 0.333 in.
• Drive Type: T25 6-Lobe
• Thread Type: Variable Thread Design
• TPI: Variable
• Point Type: High-Low Threaded Point
• Coating/Finish: Yellow-Zinc Coated
• Measurement Unit: Pack
• Country of Origin: Taiwan

Available Pack Options

• CSVZ212R80: 80 Pk - includes (1) T25 6-lobe driver bit (replacement driver bit BIT25T-2-R2)
• CSVZ212R240: 240 Pk - includes (1) T25 6-lobe driver bit (replacement driver bit BIT25T-2-R2)
• CSVZ212MB: 1750 Pk - includes (2) T25 6-lobe driver bits (replacement driver bit BIT25T-2-R2)

Approved Applications

• General-purpose interior wood-to-wood fastening
• Fastening into dimensional lumber
• Fastening into engineered-wood materials such as OSB, plywood, and LVL
• Interior construction and finish carpentry applications

Frequently Asked Questions

What type of driver bit does the Simpson Strong-Drive CSV Construction Screw require?

The CSV Construction Screw uses a T25 6-Lobe driver bit. This six-lobe interface is designed to maximize torque transfer and minimize bit slippage during driving.

Is this screw suitable for use with engineered-wood products like LVL or OSB?

Yes. The CSV Construction Screw features a variable thread design and high-low threaded point specifically optimized for countersinking into today's wood and engineered-wood materials, including dimensional lumber and engineered-wood panels.

What does the yellow-zinc coating provide?

The yellow-zinc coating provides corrosion resistance suited to interior wood and engineered-wood applications. It is intended for protected interior environments rather than exterior or treated-lumber exposure.

Why does the variable thread design help with battery-powered tools?

The low-torque variable thread design reduces the rotational resistance required to drive each screw, which Simpson states allows up to 35% more screws to be driven on a single battery charge - making these screws well suited for high-volume interior fastening with cordless drivers.