S-90409A169 1/2"-20 x 3 1/2" 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 corrosion resistance and durability through Grade 8 steel construction with Rockwell C32 hardness
- Enhanced vibration resistance with UNF fine threading and Class 2A thread fit for secure fastening
- Easy installation and removal with external hex drive design requiring standard wrench tools
- Improved load distribution through integrated flange design that eliminates need for separate washers
- Optimal thread engagement with partially threaded shank design for precise clamping control
- Regulatory compliance assurance meeting RoHS 3 and REACH environmental standards for global applications
Professional Applications & Engineering Value
This Grade 8 heavy-duty hex head screw delivers exceptional engineering value for demanding industrial applications where failure is not an option. The 150,000 psi tensile strength and Rockwell C32 hardness ensure reliable performance in heavy machinery, construction equipment, and automotive assemblies subjected to extreme loads and vibrations. The 1/2"-20 UNF fine thread configuration provides superior resistance to loosening under dynamic loading conditions, while the flanged design distributes clamping force evenly across joined surfaces. Manufactured to IFI 111/SAE J429 specifications, these steel fasteners offer predictable performance characteristics essential for engineering calculations and safety-critical applications across various industrial sectors.
Specification Summary & Compliance
This 3 1/2" length hex head screw features precise Class 2A thread fit tolerance for consistent engagement and 1/2"-20 UNF fine threading meeting standardized dimensions. Manufacturing complies with IFI 111 SAE J429 specifications ensuring material and performance consistency. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant (06/14/2023 235 SVHC), meeting international environmental regulations for hazardous substances.
