S-92620A334 1 1/4"-7 x 8" 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 provided by zinc yellow-chromate plating, extending service life in harsh environments
- Optimized thread engagement with coarse UNC threading and Class 2A fit ensuring secure fastening and vibration resistance
- Enhanced durability through Rockwell C33 hardness and Grade 8 classification for long-term structural integrity
- Easy installation and removal with external hex drive and 1 7/8" head width for standard tool compatibility
- Versatile partial threading allowing both clamping and alignment functions in various assembly scenarios
- Regulatory compliance assurance meeting industrial standards including ASME B18.2.1 and SAE J429
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment where high tensile strength and corrosion resistance are paramount. The 1 1/4"-7 UNC coarse thread configuration provides excellent grip in various materials while the partial threading design offers optimal stress distribution. The zinc yellow-chromate plating creates a protective barrier against environmental factors, significantly reducing maintenance requirements in demanding applications such as construction equipment, automotive assemblies, and infrastructure projects. With their external hex drive and substantial head dimensions, these fasteners enable efficient installation and removal using standard industrial tools.
Specification Summary & Compliance
This 8-inch hex head screw features precise Class 2A thread fit with 1 1/4"-7 UNC coarse threading and 3-inch minimum thread length. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications requiring strict chemical substance control.
