S-92620A288 7/8"-9 x 2 1/4" 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
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
- Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
- Enhanced durability with Rockwell C33 hardness, maintaining structural integrity under repeated stress
- Secure torque transmission through external hex drive design with 1 5/16" head width for easy installation
- Partial threading design providing unthreaded shank section for precise clamping and shear resistance
- Industry compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for industrial applications requiring maximum clamping force and vibration resistance. The 7/8"-9 UNC coarse thread configuration ensures rapid installation in structural steel, heavy machinery, and construction equipment, while the partially threaded design provides superior shear strength at the joint interface. The zinc yellow-chromate plating creates a protective barrier against corrosion in outdoor or chemically aggressive environments, significantly reducing maintenance frequency. With 150,000 psi tensile strength and Rockwell C33 hardness, this fastener maintains dimensional stability under extreme loads, making it ideal for critical connections in manufacturing plants, transportation equipment, and infrastructure projects where failure is not an option.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 7/8"-9 UNC coarse threading and 2 1/4" length (minimum 2" thread length). Complies with ASME B18.2.1 and SAE J429 Grade 8 specifications for dimensional accuracy and mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring safe use across global industrial markets.
