S-90201A228 5/16"-18 x 1 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 demanding environments
- Optimized thread engagement through UNC coarse threading and Class 2A fit ensures secure fastening and vibration resistance
- High hardness rating of Rockwell C38 minimizes wear and maintains structural integrity under repeated use
- Versatile partial threading design allows for precise clamping force distribution across joined materials
- Heavy-duty Grade 9 classification guarantees consistent performance in critical industrial applications
- Comprehensive regulatory compliance with RoHS 3 and REACH standards ensures environmental and safety adherence
Professional Applications & Engineering Value
These Grade 9 hex head screws deliver exceptional engineering value through their high-strength steel construction and zinc yellow-chromate plating, specifically engineered to address common industrial fastening challenges. The UNC coarse threading combined with Class 2A thread fit provides superior resistance to vibration loosening in heavy machinery, construction equipment, and structural assemblies. The partial threading design allows for optimal stress distribution, preventing material deformation in critical joints. With 180,000 PSI tensile strength and Rockwell C38 hardness, these fasteners maintain integrity under extreme loads while the corrosion-resistant finish ensures long-term reliability in harsh operating environments, making them ideal for industrial applications requiring durable, high-performance fastening solutions.
Specification Summary & Compliance
This 5/16"-18 hex head screw features precise Class 2A thread fit tolerance and UNC coarse threading standards, manufactured to maintain dimensional accuracy across all critical parameters. The fastener meets Grade 9 strength classification requirements with verified 180,000 PSI tensile strength and Rockwell C38 hardness. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures adherence to environmental and safety standards for industrial applications worldwide.
