S-92316A243 5/8"-18 x 1 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

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 that extends service life in demanding environments
• Precise thread engagement with UNF fine thread and Class 2A fit ensuring secure fastening and vibration resistance
• Enhanced installation efficiency featuring external hex drive and flange design for easier wrench access and built-in washer functionality
• Maximum thread utilization with fully threaded design providing consistent clamping force along the entire fastener length
• Industry-proven reliability meeting Grade 8 specifications with Rockwell C32 hardness for durability under extreme conditions
• Regulatory compliance assurance with RoHS 3 and REACH compliance for environmentally responsible manufacturing

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers exceptional engineering value for heavy-duty industrial applications where failure is not an option. The black phosphate steel construction provides superior corrosion protection in challenging environments, while the UNF fine thread configuration offers enhanced vibration resistance compared to coarse thread alternatives. The integrated flange feature eliminates the need for separate washers, reducing assembly time and potential points of failure. With its external hex drive design, technicians can achieve higher torque values during installation, ensuring secure fastening in critical machinery, construction equipment, and automotive assemblies. The fully threaded 1 3/4" length provides uniform stress distribution, making it ideal for applications requiring consistent clamping force across thick materials and structural components.

Specification Summary & Compliance

This high-performance hex head screw features precise 5/8"-18 UNF Class 2A thread fit with right-hand threading and fine thread spacing for optimal engagement. Manufactured to exacting Grade 8 specifications with Rockwell C32 hardness and 150,000 psi tensile strength. The fastener complies with IFI 111/SAE J429 standards for quality assurance and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring suitability for regulated industrial applications worldwide.