S-92316A239 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, ideal for high-stress industrial assemblies
- Superior corrosion protection from the black phosphate steel coating, extending service life in harsh environments
- Enhanced torque transmission via the external hex head design, allowing for secure installation with standard tools
- Reliable thread engagement with Class 2A UNF fine threads, ensuring precise fit and vibration resistance
- Increased bearing surface from the integrated flange, distributing clamp load effectively and reducing surface damage
- Optimized for heavy-duty applications with Grade 8 strength and Rockwell C32 hardness, resisting deformation under extreme conditions
- Partial threading design provides unthreaded shank for improved shear strength in structural connections
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these Grade 8 hex head screws deliver critical performance where failure is not an option. The black phosphate steel coating creates a protective barrier against corrosion, significantly outperforming plain steel in humid or chemically exposed settings. The UNF fine thread configuration with Class 2A fit ensures superior vibration resistance compared to coarse-thread alternatives, making these partially threaded screws ideal for machinery, heavy equipment, and structural applications where precise clamping force and joint integrity are paramount. The combination of 150,000 psi tensile strength and flanged design provides exceptional reliability in high-load scenarios while eliminating the need for separate washers.
Specification Summary & Compliance
This 1/2"-20 hex head screw features precise Class 2A thread fit per UNF standards with a minimum thread length of 1-1/2" and overall length of 3-1/2". Manufactured to meet IFI 111/SAE J429 specifications for Grade 8 fasteners, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications requiring restricted substance compliance.
