S-90201A232 5/16"-18 x 3" 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 demanding environments
- Enhanced installation efficiency through external hex drive design that accommodates standard wrenches and sockets
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure fastening and vibration resistance
- Reduced assembly weight through partial threading design while maintaining full mechanical strength where needed
- Consistent hardness performance at Rockwell C38 for excellent wear resistance and durability
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing
Professional Applications & Engineering Value
These Grade 9 hex head screws deliver critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assemblies. The combination of high-strength steel material and zinc yellow-chromate plating addresses common failure points in corrosive environments while maintaining 180,000 PSI tensile strength. The 5/16"-18 UNC coarse thread configuration provides superior grip in various materials, reducing the risk of stripping and ensuring long-term joint integrity. Partially threaded design concentrates strength where needed most, making these industrial hex screws ideal for applications requiring precise clamp load distribution and vibration resistance in construction, manufacturing, and heavy equipment maintenance.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent performance. Features 5/16"-18 UNC coarse threads with minimum thread length of 7/8" on a 3" overall length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to international standards for hazardous substance restrictions.
