S-91478A728 Length 4" ASME B18.2.1 Wood Screws
Wood Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc plating that protects against rust in demanding wood applications
- Maximum torque transmission through the external hex head design, preventing cam-out during high-torque installation
- Exceptional holding power achieved through thread-forming design that creates permanent, vibration-resistant connections in wood
- Optimized wood engagement with 6 threads per inch providing superior pull-out resistance in structural applications
- Easy alignment and installation with partially threaded shank design that reduces wood splitting
- Enhanced durability with steel construction maintaining structural integrity under heavy loads
- Industry-standard compatibility with 3/4" hex head accommodating standard tools for efficient installation
Professional Applications & Engineering Value
These heavy-duty wood screws are engineered to solve critical fastening challenges in wood construction and industrial applications. The zinc-plated steel construction provides essential corrosion protection for long-term structural integrity, while the thread-forming design eliminates the need for pre-drilling in many applications, creating stronger connections by compressing wood fibers rather than removing them. The external hex drive system ensures maximum torque transmission without stripping, crucial for high-stress applications where vibration resistance is paramount. With a substantial 2 1/2" minimum thread length and 1/2" diameter, these screws deliver exceptional pull-out resistance in framing, decking, and structural wood assemblies where failure is not an option.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 specifications ensuring dimensional accuracy and performance reliability. Features right-hand threading with approximately 6 threads per inch on a 1/2" diameter shaft. The partially threaded design with pointed tip facilitates precise placement and reduced installation effort. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and industrial use.
