S-90409A163 1/2"-20 x 1 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws
High-Strength Grade 8 Steel Flanged 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 strength for demanding applications with Grade 8 steel construction and a tensile strength of 150,000 psi, ensuring reliable performance under high stress.
- Superior resistance to wear and deformation due to Rockwell C32 hardness, extending the fastener's service life in rigorous environments.
- Secure and precise fastening with a 1/2"-20 UNF fine thread and Class 2A fit, providing excellent vibration resistance and reduced loosening.
- Efficient installation and high torque capability offered by the external hex drive and 3/4" head width, compatible with standard tools.
- Enhanced load distribution and stability from the integrated flange, eliminating the need for a separate washer and simplifying assembly.
- Optimized for partial thread applications with a 1 1/4" minimum thread length, allowing for precise clamping in specific joint designs.
- Compliance with global standards including IFI 111/SAE J429, RoHS 3, and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This Grade 8 steel hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where high tensile strength and vibration resistance are paramount. The UNF fine thread design enhances grip in metal-to-metal connections, reducing the risk of thread stripping under dynamic loads. Its partially threaded and flanged configuration provides controlled clamping force, ideal for securing components like engine brackets, structural frames, and industrial equipment. Made from robust steel with a Rockwell C32 hardness, it withstands corrosion and mechanical stress, ensuring long-term reliability in demanding industrial applications while meeting stringent SAE J429 specifications.
Specification Summary & Compliance
This fastener features precise Class 2A thread fit and UNF fine thread standards for consistent performance. It adheres to IFI 111 SAE J429 for mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
