S-91478A638 Length 3 1/2" 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, ensuring long-lasting performance in wood applications
- Enhanced torque transmission via external hex drive design, preventing stripping during installation
- Optimal wood fastening with partial threading, reducing wood splitting while maintaining strong pull-out resistance
- Extended thread engagement with 2 1/4" minimum thread length, providing reliable holding power in thick materials
- Industry-standard compliance meeting ASME B18.2.1 specifications for dimensional accuracy and performance
- Thread-forming design creates strong, permanent threads in wood without pre-drilling in many applications
- Environmental compliance with RoHS 3 and REACH regulations, ensuring safe industrial usage
Professional Applications & Engineering Value
These heavy-duty wood screws are engineered to address common challenges in wood construction and industrial woodworking. The zinc-plated steel construction provides essential corrosion protection for both indoor and outdoor applications, while the external hex drive delivers maximum torque transmission without cam-out issues. The thread forming design creates permanent, high-strength threads in wood substrates, eliminating the need for tapping operations in many cases. With 3/8"-7 threading and partial threading configuration, these screws distribute clamping force effectively while minimizing wood splitting. The 3 1/2" length with substantial thread engagement makes them ideal for structural wood connections, timber framing, and heavy-duty furniture assembly where reliability is critical.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 standards ensuring precise dimensional accuracy and thread form consistency. The screws feature 3/8" diameter with 7 threads per inch in right-hand direction, partial threading configuration, and Class 2A thread tolerances for reliable performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe industrial usage and environmental responsibility.
