S-91478A842 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-plated steel construction for extended service life in demanding wood applications
- Maximum torque transmission through 1/2" hex head design prevents stripping during high-torque installation
- Enhanced wood gripping power with 4.5 TPI thread pitch and thread forming design for superior holding strength
- Optimized load distribution through partially threaded design that concentrates holding power where needed most
- Easy installation with pointed tip that reduces splitting and facilitates quick penetration into wood materials
- Industry-standard compatibility with external hex drive systems for use with standard installation tools
- Reliable performance backed by ASME B18.2.1 specifications for consistent quality and dimensional accuracy
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, while the 4.5 TPI thread pitch and thread forming design create superior holding power without requiring pre-tapped holes. The partially threaded configuration ensures maximum clamping force by allowing the unthreaded shank to act as a dowel, preventing wood separation under load. The external hex drive and substantial 1/2" head height deliver exceptional torque transmission, reducing installation time and preventing tool slippage. These features make these 3/4" wood screws ideal for structural wood connections, timber framing, and heavy-duty wood assemblies where reliability is paramount.
Specification Summary & Compliance
These wood screws feature Class 2A thread tolerances with 0.75" thread diameter and 4.5 threads per inch in right-hand direction. The partially threaded design provides 2 1/2" minimum thread length on a 4" overall length with round shank cross-section. Manufacturing and dimensional compliance meets ASME B18.2.1 standards for hex head screws. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in industrial and commercial applications.
