S-92316A246 5/8"-18 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 a tensile strength of 150,000 psi, ideal for high-stress industrial assemblies.
- Superior corrosion resistance thanks to the black-phosphate steel coating, extending service life in harsh environments.
- Precise and secure fastening ensured by the Class 2A thread fit and UNF fine thread design, reducing the risk of loosening under vibration.
- Easy installation and removal with a standard 15/16" external hex head, compatible with common wrenches.
- Enhanced stability and distribution from the integrated flange, minimizing the need for separate washers.
- Reliable performance in demanding applications backed by Grade 8 strength and Rockwell C32 hardness.
- Regulatory peace of mind with compliance to SAE J429, RoHS 3, and REACH standards.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered for heavy-duty applications where failure is not an option. The black-phosphate steel construction provides a robust barrier against rust and corrosion, making it suitable for outdoor machinery, automotive frames, and structural steel connections. Its UNF fine thread and partial threading allow for better clamping force and reduced thread galling in high-vibration environments like engines or conveyor systems. The flanged design increases bearing surface area, preventing surface damage and simplifying assembly. With a tensile strength of 150,000 psi, it reliably secures critical joints in construction, mining, and manufacturing equipment, ensuring long-term operational integrity.
Specification Summary & Compliance
This fastener features a 5/8"-18 UNF fine thread with Class 2A thread fit for precise tolerance. It meets IFI 111 / SAE J429 specifications for Grade 8 mechanical properties, including hardness (Rockwell C32) and tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global markets.
