S-92620A291 7/8"-9 x 3 3/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex Head 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
- Maximum load-bearing capacity with 150,000 PSI tensile strength and Rockwell C33 hardness, ideal for high-stress industrial applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
- Optimized coarse thread design (7/8"-9 UNC) enables faster installation and reduced cross-threading risks
- Precision Class 2A thread fit ensures consistent engagement and reliable fastening performance
- Heavy-duty hex head design (1 5/16" width) provides superior torque transmission and tool grip
- Partial threading configuration allows for precise clamp load control in multi-material assemblies
- Full regulatory compliance with ASME B18.2.1, SAE J429, RoHS 3 and REACH standards
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction equipment, machinery frames, and structural assemblies. The zinc yellow-chromate plated steel construction provides critical corrosion resistance against moisture, chemicals, and environmental exposure, significantly reducing maintenance frequency. The 7/8"-9 UNC coarse thread configuration ensures rapid installation in thick materials while maintaining 150,000 PSI tensile strength under extreme loads. The external hex drive and substantial head dimensions (1 5/16" width) enable high-torque application without stripping, making them ideal for applications requiring ASME B18.2.1 compliance and reliable, long-term fastening solutions.
Specification Summary & Compliance
This heavy-duty hex head screw features precision Class 2A thread fit with 7/8"-9 UNC coarse threading and partial threading up to 2" minimum thread length. Manufactured to ASME B18.2.1 specifications and SAE J429 Grade 8 standards, the fastener demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 3 3/4" length and external hex drive configuration ensure compatibility with standard industrial tooling while maintaining dimensional accuracy per inch measurement system requirements.
