S-91478A726 Length 3 1/2" ASME B18.2.1 Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding wood applications
• Maximum torque transmission through external hex drive design, preventing cam-out during high-torque installation
• Enhanced holding power with thread forming technology that creates stronger, permanent threads in wood materials
• Optimized thread engagement featuring 6 threads per inch and partial threading for balanced grip strength and installation efficiency
• Robust structural integrity with 1/2" diameter and 3-1/2" length providing exceptional load-bearing capacity
• Streamlined installation with pointed tip design for easier penetration and reduced splitting in wood substrates
• Industry-standard compatibility with 3/4" hex head dimensions ensuring tool compatibility across professional applications

Professional Applications & Engineering Value

These heavy-duty wood screws are engineered specifically for demanding wood construction and fabrication applications where superior holding power and long-term reliability are critical. The zinc-plated steel construction provides essential corrosion protection for both indoor and protected outdoor environments, while the external hex drive system ensures maximum torque transfer without stripping during high-stress installations. The thread forming design creates compressed wood fibers around the threads, eliminating the need for pre-drilling in many applications and providing significantly greater pull-out resistance compared to conventional wood screws. This makes them ideal for structural wood connections, timber framing, deck construction, and heavy furniture assembly where vibration resistance and long-term structural integrity are paramount concerns for engineering professionals.

Specification Summary & Compliance

Manufactured to exacting ASME B18.2.1 standards with precise dimensional tolerances for consistent performance. Features 1/2" diameter with 6 threads per inch in right-hand direction and partial threading configuration. The 3-1/2" length provides optimal penetration depth for substantial wood thicknesses. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial and construction applications.