Simpson Strong-Drive CSV Construction Screw, #10 x 3" is a versatile, multi-purpose interior fastening solution engineered for effortless installation into dimensional lumber, solid wood, and engineered-wood materials. Built with a yellow-zinc coated finish, a variable thread design, and a rimmed flat head with underhead nibs, this construction screw is purpose-built to countersink cleanly and hold firmly - making it a reliable choice for wood-to-wood connections, subfloor work, general framing applications, and any interior project where a fast-driving, low-torque fastener is needed.

Key Features

• Yellow-Zinc Coated Finish - provides corrosion resistance suited for interior wood and engineered-wood applications, helping fasteners maintain holding strength over time
• Rimmed Flat Head with Underhead Nibs - countersinks easily into wood and engineered-wood surfaces and leaves a clean, flush, finished appearance without additional prep work
• Variable Thread Design with Low-Torque Threads - reduces the effort required to drive each screw, allowing significantly more fasteners to be driven on a single battery charge compared to conventional thread designs
• High-Low Threaded Point - provides fast starts and secure thread engagement, reducing the chance of slipping or cam-out during installation
• T25 6-Lobe Drive Type - delivers positive engagement between bit and fastener head, minimizing stripping and giving the installer better torque transfer and control
• #10 x 3" Size - offers substantial penetration depth into framing members and engineered panels, supporting strong, lasting connections across a range of interior structural and finish applications

Why This Product

• Optimized for engineered wood and dimensional lumber - the variable thread design and high-low threaded point are specifically engineered to perform in the materials most commonly found on modern job sites, including LVL, OSB, and plywood assemblies
• Reduces tool fatigue and battery drain - low-torque threads mean each screw requires less rotational force to drive, extending battery runtime and reducing strain during high-volume fastening tasks
• Clean countersinking without pre-drilling - the rimmed flat head with nibs seats itself flush and cleanly into wood surfaces, eliminating the need for a countersink bit on most interior applications and saving time on the job
• Dependable drive engagement - the T25 6-lobe socket pairs directly with a matching driver bit, giving installers a secure, wobble-free connection that reduces fastener damage and rework

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length (in.): 3
• Head Diameter (in.): 0.333
• 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: Yellow-Zinc Coated
• Finish: Yellow-Zinc Coated
• Measurement Unit: Pack
• Country of Origin: Taiwan

Available Pack Options

• CSVZ3R70: 70 Pk - includes (1) T25 6-lobe driver bit (replacement driver bit BIT25T-2-R2)
• CSVZ3R210: 210 Pk - includes (1) T25 6-lobe driver bit (replacement driver bit BIT25T-2-R2)
• CSVZ3MB: 1750 Pk - includes (2) T25 6-lobe driver bits (replacement driver bit BIT25T-2-R2)

Frequently Asked Questions

What type of driver bit does this screw require?

This screw uses a T25 6-lobe driver bit. This drive style provides secure, positive engagement between the bit and the fastener head, reducing the risk of stripping and improving torque transfer during installation.

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

Yes. The CSV Construction screw is specifically designed for use in today's wood and engineered-wood materials. Its variable thread design and high-low threaded point are optimized to drive cleanly and seat flush in these materials without pre-drilling.

Can this screw be used for outdoor or exterior applications?

The CSV Construction screw is designed and coated for interior applications. Its yellow-zinc coating provides corrosion resistance suited to interior wood and engineered-wood environments. For exterior or pressure-treated lumber applications, a different coating or screw type would be appropriate.

Why does the head design matter for my finished project?

The rimmed flat head with underhead nibs allows the screw to countersink easily and seat flush with the surface of the workpiece, producing a clean, finished appearance. This is especially useful in visible interior applications where a neat fastener installation is important.