S-90201A222 5/16"-18 x 1/2" 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 provided by zinc yellow-chromate plating, extending service life in harsh environments
- Optimized hardness rating of Rockwell C38 ensures excellent wear resistance and thread durability
- Enhanced installation efficiency through external hex drive design for secure tool engagement and torque application
- Reliable thread engagement with UNC coarse thread pattern and Class 2A fit for consistent fastening performance
- Full threading coverage along the entire 1/2" length maximizes grip strength and distribution
- Compliance with environmental regulations including RoHS 3 and REACH for safe industrial usage
Professional Applications & Engineering Value
This Grade 9 hex head screw delivers exceptional engineering value through its high-strength steel construction and zinc yellow-chromate plating, specifically engineered to address common industrial fastening challenges. The fully threaded UNC coarse thread design provides superior resistance to vibration loosening in heavy machinery, construction equipment, and structural assemblies. The external hex drive enables high-torque installation without stripping, while the Class 2A thread fit ensures consistent engagement in manufacturing environments. Ideal for critical applications requiring 180,000 PSI tensile strength, these screws maintain integrity under extreme mechanical stress while the corrosion-resistant finish protects against environmental degradation in outdoor or chemically exposed settings.
Specification Summary & Compliance
This fastener features precision 5/16"-18 UNC coarse threads with Class 2A thread fit tolerance for reliable assembly. Manufactured to meet Grade 9 strength requirements with verified 180,000 PSI tensile strength and Rockwell C38 hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across industrial applications. The zinc yellow-chromate plated finish provides consistent corrosion protection while maintaining dimensional stability.
