S-91478A597 Length 3 1/2" ASME B18.2.1 Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in humid or outdoor wood applications
• Enhanced torque transmission through the external hex drive design, allowing for secure installation with standard tools and reduced slippage
• Strong thread engagement with the thread-forming tapping method, creating durable, vibration-resistant connections in wood without pre-drilling
• Optimized pull-out resistance due to the 9 TPI (threads per inch) and pointed tip, providing quick starts and reliable holding power
• Reduced material splitting with partially threaded shank design, concentrating grip where needed while minimizing stress on the wood
• Broad compatibility with a 3 1/2" length and 5/16" diameter, suitable for heavy-duty wood construction, framing, and furniture assembly
• Assured quality and safety by meeting ASME B18.2.1 standards, RoHS 3, and REACH compliance for professional and regulatory peace of mind

Professional Applications & Engineering Value

These zinc-plated steel wood screws are engineered to address common challenges in woodworking and construction, such as material fatigue and environmental exposure. The thread-forming design with a right-hand thread and 9 TPI ensures deep, secure penetration into wood fibers, reducing the risk of stripping and enhancing load distribution. The external hex drive allows for high-torque applications, making them ideal for structural projects like deck building, timber framing, and outdoor furniture where corrosion resistance is critical. By combining a partially threaded shank with a pointed tip, these screws minimize wood splitting while providing consistent clamping force, delivering reliable performance in demanding wood screw applications without compromising on durability or compliance.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a thread diameter of 0.313" (5/16") and minimum thread length of 2 1/4", with manufacturing conforming to ASME B18.2.1 for consistent quality. The screws feature a Class 2A inch-based thread fit, ensuring reliable engagement in wood materials. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms the absence of hazardous substances, supporting safe and environmentally responsible use in industrial and construction settings.