S-98643A656 Length 3 1/2" Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term durability in humid or outdoor wood applications
• Enhanced torque transmission through the No. 2 square drive, reducing cam-out and tool slippage during installation
• Self-tapping efficiency with thread cutting design and drilling tip, eliminating pre-drilling and speeding up assembly in wood materials
• Secure flush installation thanks to the 90° countersink angle and standard flat head profile, providing a smooth, professional finish
• Vibration-resistant locking from serrations under the head, preventing loosening under dynamic loads in wood structures
• Optimized thread engagement with partial threading and 2-1/4" minimum thread length, maximizing pull-out strength while minimizing splitting
• Reliable dimensional consistency with 0.19" thread diameter and 8 TPI, ensuring predictable performance across batch productions

Professional Applications & Engineering Value

This heavy-duty wood screw addresses critical challenges in wood construction and industrial assembly. The 18-8 stainless steel composition provides exceptional resistance to rust and chemical exposure, making it ideal for outdoor furniture, decking, and marine applications where moisture is a concern. The thread cutting technology combined with the drilling tip allows for direct installation into hardwoods and composite materials without pilot holes, significantly reducing labor time and tool changes. The square drive delivers maximum torque transfer for high-tension fastening in structural wood connections, while the serrated locking feature maintains clamp load under vibration—critical for machinery bases and transportation equipment. With its partial threading design, it concentrates holding power where needed most, reducing the risk of wood splitting in delicate applications like cabinetry and millwork.

Specification Summary & Compliance

This No. 10 wood screw features precise inch-system dimensions including 0.19" thread diameter, 8 threads per inch, and 3-1/2" overall length with partial threading (minimum 2-1/4" thread length). Manufactured to standard flat head profile with 90° countersink angle and No. 2 square drive specifications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in industrial environments without hazardous substances.