S-92620A808 5/8"-11 x 3 1/2" 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 for critical structural applications
- Superior corrosion resistance through zinc yellow-chromate plating in harsh industrial environments
- Enhanced durability with Rockwell C33 hardness to withstand repeated stress and vibration
- Reliable coarse thread engagement with UNC threading for faster assembly and reduced cross-threading risk
- Precise Class 2A thread fit ensuring consistent performance and easy installation
- Full threading design providing maximum grip length and uniform stress distribution
- External hex drive compatibility for standard tooling and high-torque applications
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional engineering value in demanding industrial settings where failure is not an option. The high-strength steel construction combined with zinc yellow-chromate plating creates a robust fastener that resists corrosion while maintaining structural integrity under extreme loads. The coarse UNC thread pattern ensures rapid installation in heavy machinery, construction equipment, and structural steel applications where vibration resistance is critical. With full threading along the entire 3½" length, these screws provide maximum clamping force distribution, preventing joint loosening in high-stress environments. The external hex drive accommodates standard industrial tools for efficient installation and maintenance operations.
Specification Summary & Compliance
Manufactured to exacting ASME B18.2.1 and SAE J429 Grade 8 specifications, these hex head screws feature precision Class 2A thread fit with 5/8"-11 UNC coarse threading. The fasteners maintain dimensional accuracy throughout their 3½" length and 15/16" head width. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety standards are met for industrial applications.
