S-92316A245 5/8"-18 x 2 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 load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through black-phosphate steel coating, extending service life in harsh environments
- Optimized thread engagement with UNF fine threading and Class 2A fit ensuring vibration-resistant connections
- Enhanced installation efficiency through external hex drive design providing maximum torque transfer
- Reduced assembly complexity with integrated flange eliminating the need for separate washers
- Precise partial threading allowing controlled clamp force distribution across connected materials
- Industry compliance assurance meeting rigorous SAE J429 and IFI 111 specifications for quality verification
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions where high tensile strength and corrosion resistance are paramount. The black-phosphate steel construction provides superior protection against environmental degradation, while the UNF fine thread pattern maintains secure fastening in vibrating machinery and structural assemblies. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening in heavy equipment, construction machinery, and automotive systems. With external hex drive compatibility and integrated flange feature, installation time is reduced without compromising the integrity of high-stress connections in industrial maintenance and manufacturing applications.
Specification Summary & Compliance
Manufactured to exact Class 2A thread fit tolerances with 5/8"-18 UNF fine threading and 2 3/4" length dimensions. Complies with IFI 111 and SAE J429 specifications for Grade 8 fasteners, ensuring 150,000 psi tensile strength and Rockwell C32 hardness. Meets environmental standards including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for restricted substance control.
