S-90201A537 5/8"-11 x 2 3/4" Extreme-Strength Grade 9 Steel Hex Head Screws
Extreme-Strength Grade 9 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 180,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
- Optimized torque transmission with external hex drive design ensuring secure installation and removal
- Enhanced durability from Rockwell C38 hardness that maintains structural integrity under repeated use
- Precise thread engagement with Class 2A thread fit providing consistent fastening performance
- Versatile partial threading allowing for both clamping and alignment functions in assembly operations
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
Professional Applications & Engineering Value
These Grade 9 hex head screws deliver critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The 5/8"-11 UNC coarse thread configuration ensures rapid installation and superior resistance to vibration loosening in dynamic applications. The zinc yellow-chromate plating creates a protective barrier that significantly extends service life in corrosive environments, while the partially threaded design provides optimal clamp load distribution. Engineered with 180,000 psi tensile strength and Rockwell C38 hardness, these steel fasteners maintain structural integrity under extreme mechanical stress, making them ideal for construction, manufacturing, and heavy equipment maintenance where failure is not an option.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit per UNC standards with 5/8"-11 coarse threading and 2 3/4" length. Manufactured from high-strength steel with zinc yellow-chromate plating finish, the fastener meets Grade 9 mechanical properties including 180,000 psi tensile strength and Rockwell C38 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.
