S-94048A251 Length 1 1/4" ASME B18.2.1, ASTM A307, SAE J429 Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, extending service life in demanding wood applications
• Enhanced torque transmission through external hex drive design, preventing cam-out during high-torque installation
• Exceptional holding power with thread forming tapping method that creates strong, permanent threads in wood materials
• Optimized thread engagement through partial threading design, providing maximum grip strength where needed most
• Industry-standard compatibility with 5/16" diameter and 1-1/4" length, ensuring reliable performance across wood construction projects
• Secure fastening performance with pointed tip for easy starting and right-hand thread direction for standard installation
• Reduced maintenance requirements thanks to durable galvanized coating that withstands environmental exposure

Professional Applications & Engineering Value

These hot-dipped galvanized steel wood screws deliver exceptional engineering value for professional wood construction and fabrication. The thread forming design eliminates the need for pre-drilling in many applications, creating permanent threads that resist loosening under vibration and load stress. The external hex drive system provides superior torque transmission compared to standard drives, preventing stripping during high-torque installation in hardwoods and engineered wood products. The partial threading concentrates gripping power in the critical engagement zone while allowing for material compression and expansion. The heavy-duty zinc coating provides sacrificial protection against corrosion, making these screws ideal for outdoor structures, decking, framing, and other wood applications where moisture resistance is critical. These features combine to solve common wood fastening challenges including joint separation, corrosion failure, and installation inefficiency.

Specification Summary & Compliance

Manufactured to exacting inch system dimensions with 5/16" diameter and 1-1/4" length, featuring 9 threads per inch and minimum thread length of 0.833". These screws comply with ASME B18.2.1 dimensional standards, ASTM A307 for carbon steel bolts and studs, and SAE J429 mechanical properties. The products are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting the latest environmental regulations for hazardous substances. The hot-dipped galvanized surface treatment provides consistent corrosion protection while maintaining the mechanical properties required for demanding wood fastening applications.