S-90201A544 5/8"-11 x 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, ideal for high-stress applications
- Superior corrosion resistance from zinc yellow-chromate plating, extending service life in harsh environments
- Optimized torque transmission through external hex drive design for secure installation
- Reliable thread engagement with Class 2A thread fit ensuring precise assembly compatibility
- Enhanced durability from Rockwell C38 hardness, maintaining structural integrity under repeated stress
- Versatile partial threading allowing flexibility in clamping range while maintaining unthreaded shank strength
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 9 hex head screw delivers critical performance where structural integrity is paramount. The 5/8"-11 UNC coarse thread configuration provides superior resistance to vibration loosening in construction equipment, machinery frames, and structural steel connections. The zinc yellow-chromate plating creates a protective barrier against corrosion in outdoor or chemically aggressive environments, while the partial threading design concentrates thread engagement where needed most, preventing stress concentration in the fastened materials. With 180,000 psi tensile strength and Rockwell C38 hardness, these industrial fasteners maintain clamping force under extreme loads, making them essential for critical connections in manufacturing, infrastructure, and heavy equipment assembly.
Specification Summary & Compliance
This 4" length hex head screw features 5/8"-11 UNC coarse threads with Class 2A thread fit tolerance for precise assembly. Manufactured from high-strength steel with external hex drive and partial threading extending 1½" minimum. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance for industrial applications.
