S-90409A187 5/8"-18 x 2" 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 load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior wear resistance thanks to Rockwell C32 hardness, ensuring extended service life in demanding environments
- Precise thread engagement with Class 2A fit and UNF fine threading for secure, vibration-resistant connections
- Enhanced stability and load distribution through the integrated flange design, eliminating the need for separate washers
- Heavy-duty construction meeting Grade 8 specifications and SAE J429 standards for consistent quality and performance
- Optimized installation efficiency with standard 15/16" external hex drive for easy torque application with common tools
- Environmental compliance assurance with RoHS 3 and REACH regulations for safe use across global industrial markets
Professional Applications & Engineering Value
These Grade 8 steel hex head screws deliver critical engineering solutions where high tensile strength and vibration resistance are paramount. The UNF fine thread configuration provides superior clamping force distribution compared to coarse threads, while the fully threaded design ensures maximum engagement across the entire 2" length. The integrated flange eliminates washer requirements while providing enhanced bearing surface, making these heavy-duty fasteners ideal for structural assemblies, heavy machinery, and automotive applications where 150,000 psi tensile strength prevents joint failure under extreme loads. The external hex drive accommodates standard industrial tools for efficient installation in confined spaces.
Specification Summary & Compliance
Manufactured to IFI 111/SAE J429 specifications with Class 2A thread fit ensuring precision compatibility with standard UNF nuts and threaded components. The 5/8"-18 UNF fine thread maintains consistent pitch accuracy throughout the 2" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, these inch system screws meet international standards for industrial fastener applications requiring verified material composition and manufacturing consistency.
