S-90201A117 1/4"-20 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 harsh industrial environments
- Optimized thread engagement through UNC coarse threading and Class 2A fit ensures secure fastening and vibration resistance
- Enhanced durability from Rockwell C38 hardness maintains structural integrity under repeated loading conditions
- Efficient installation with external hex drive design allows for high torque application using standard tools
- Partial threading design provides unthreaded shank section for precise clamping force distribution
- Regulatory compliance with RoHS 3 and REACH standards ensures environmental and safety adherence for global applications
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these Grade 9 hex head screws deliver exceptional performance where reliability is critical. The steel construction combined with zinc yellow-chromate plating provides superior corrosion protection for outdoor equipment, machinery assemblies, and structural frameworks exposed to environmental elements. The 1/4"-20 UNC coarse thread configuration ensures rapid installation and secure fastening in various materials, while the partial threading design prevents joint loosening under vibration. These heavy-duty hex screws are particularly valuable in construction, manufacturing, and automotive industries where 180,000 PSI tensile strength and Rockwell C38 hardness are essential for maintaining structural integrity under extreme mechanical stress and dynamic loading conditions.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit tolerance with 1/4"-20 UNC coarse threads and partial threading over a minimum 3/4" length. Manufactured to Grade 9 standards with 180,000 PSI tensile strength and Rockwell C38 hardness. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across industrial sectors while meeting international quality standards for inch-system fasteners.
