S-92316A323 5/16"-24 x 1 1/4" 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 load-bearing capacity with 150,000 PSI tensile strength, ideal for high-stress industrial assemblies
- Superior corrosion resistance from black-phosphate steel coating, extending service life in harsh environments
- Precise thread engagement with UNF fine thread and Class 2A fit, ensuring vibration-resistant connections
- High-strength Grade 8 classification with Rockwell C32 hardness, providing reliable performance under heavy loads
- Integrated flange design eliminates need for separate washers, simplifying installation and improving load distribution
- External hex drive compatibility allows for standard wrenching tools, enabling quick assembly and disassembly
- Full threading along 1 1/4" length offers maximum grip range for versatile application requirements
Professional Applications & Engineering Value
Engineered for demanding heavy-duty applications, these Grade 8 hex head screws deliver critical performance where failure is not an option. The black-phosphate steel construction provides essential corrosion protection for machinery, automotive, and construction equipment exposed to moisture and chemicals. The UNF fine thread configuration maintains superior clamp force retention in vibrating environments, while the flanged design distributes bearing pressure effectively across joined surfaces. With 150,000 PSI tensile strength and Rockwell C32 hardness, these industrial fasteners withstand extreme mechanical stresses in critical assemblies, from engine components to structural frameworks, ensuring long-term reliability and reduced maintenance cycles.
Specification Summary & Compliance
Manufactured to IFI 111/SAE J429 specifications with Class 2A thread fit tolerance for precise engagement. Features 5/16"-24 UNF fine threads in right-hand direction with 1 1/4" length and 11/16" flange diameter. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across regulated industries.
