Product Description
The Simpson Strong-Drive WSV Subfloor Screw #9 x 2-1/2 in. T25 Yellow Zinc Collated 750-Pack is engineered specifically for fastening subfloor sheathing to wood joists using the Quik Drive auto-feed screw driving system. Re-engineered from the ground up, this collated subfloor screw reduces driving force and increases installation speed without sacrificing the structural holding power that keeps floors tight and squeak-free. Simpson Strong-Drive structural fasteners are extensively tested to meet demanding wood-frame fastening applications, and the WSV subfloor screw delivers on that promise with a redesigned tip, variable thread pattern, and a deep 6-lobe recessed head built for high-volume production work.
Key Features
- Redesigned tip and thread pattern provides easy starts and up to 25% less torque while driving - translates directly to up to 20% faster driving, keeping crews moving on large subfloor installations
- Reduced installation torque - means less wear on auto-feed driving tools over the course of a job, lowering long-term equipment costs
- Deep 6-lobe T25 recessed ribbed head with nibs - delivers clean countersinking and more secure bit retention so cam-outs are minimized and surface finish stays clean
- High holding power at the joist-to-subfloor connection - reduces gaps between the joist and subfloor that are the primary cause of floor squeaks in finished construction
- Screws can be easily backed out - allows future access to floor cavities without damaging surrounding material, a practical advantage for renovation and repair work
- Curved collation strip compatible with Quik Drive systems - installs with the Simpson Strong-Tie Quik Drive PRO250G2, PRO300S, and Project Pro auto-feed screw driving systems for hands-free, continuous fastening
- Dual-evaluated under ICC-ES AC233 and AC120 - confirms code-compliant performance for wood-frame subfloor fastening, giving contractors and inspectors confidence on the job site
- Yellow-zinc coating applied per ASTM F1941 - provides a consistent, standardized finish that meets industry corrosion-resistance requirements for interior subfloor applications
- Includes one T25 6-lobe drive bit - pack is ready to use immediately without sourcing additional accessories
Why This Product
- Built to work faster without extra effort - the re-engineered tip and variable thread design cut driving torque by up to 25% and boost installation speed by up to 20%, making this screw a practical choice for contractors fastening large areas of subfloor sheathing who need to move quickly without sacrificing quality
- Engineered to keep floors quiet long-term - the holding power of the WSV design specifically targets the joist-to-subfloor gap that causes squeaking, addressing one of the most common callbacks in residential framing at the point of installation rather than after the fact
- Code-compliant and independently evaluated - dual evaluation under ICC-ES AC233 and AC120 means these screws meet recognized standards for wood-frame subfloor fastening, removing guesswork for professionals who need documentation to satisfy inspections
- Designed for reversibility - unlike many structural fasteners, WSV screws back out cleanly, preserving access to floor cavities for mechanical, electrical, or plumbing work and making them a smarter long-term choice for projects where future serviceability matters
Specifications
- Model Number (MPN): HCKWSV212S
- Screw Size: #9
- Length: 2-1/2 in.
- Drive Type: T25 6-Lobe
- Head Type: Rimmed Flat Head with Nibs
- Head Diameter: 0.333 in.
- Shank Type: 2/3-Threaded Shank
- Thread Type: Variable Thread Design
- Point Type: High-Low Threaded Point
- Collation Type: Curved
- Coating / Finish: Yellow-Zinc Coated (per ASTM F1941)
- Evaluation: ICC-ES AC233 and AC120
- Quantity: 750 screws per pack
Approved Applications
- Fastening wood-to-wood subfloor sheathing connections
- Wood-frame subfloor fastening (dual-evaluated under ICC-ES AC233 and AC120)
Compatible Installation Systems
This collated screw installs with the Simpson Strong-Tie Quik Drive PRO250G2, PRO300S, or Project Pro auto-feed sc
Frequently Asked Questions
- What auto-feed screw driving systems are compatible with these collated screws?
- The WSV SUBFLOOR screws are designed to install with the Simpson Strong-Tie Quik Drive PRO250G2, PRO300S, or Project Pro auto-feed screw driving systems and their compatible attachments. Each 750-piece pack also includes one T-25 6-lobe drive bit (model BITX25) for immediate use.
- Are these screws approved for use in wood-frame subfloor applications?
- Yes. The WSV SUBFLOOR screws are dual-evaluated under ICC-ES AC233 and AC120 for wood-frame subfloor fastening, making them a code-compliant choice for fastening subfloor sheathing to joists.
- How do WSV screws help prevent floor squeaks?
- The holding power of WSV screws reduces the gaps that can develop between the joist and the subfloor - gaps that are a primary cause of floor squeaks. Additionally, the screws can be easily backed out if future access to floor cavities is needed, without damaging the surrounding material.
- What makes the WSV screw faster and easier to drive than standard subfloor screws?
- The WSV screw features a redesigned tip and variable thread pattern that provides easy starts and up to 25% less torque while driving, resulting in up to 20% faster installation speeds. The deep 6-lobed recessed ribbed head also offers more secure bit retention for fewer cam-outs, and the reduced torque requirements mean less wear on your tools over time.
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