S-92316A828 5/8"-18 x 2 1/2" 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 Class 2A UNF fine threading ensuring secure fastening and vibration resistance
• Enhanced installation efficiency featuring external hex drive and flanged design for easier tool access and distributed load
• Maximum thread coverage with fully threaded construction providing consistent clamping force along the entire 2½" length
• Rigorous quality assurance meeting SAE J429 Grade 8 standards for guaranteed mechanical properties and reliability
• Environmental compliance with RoHS 3 and REACH regulations for safe use across global industrial markets

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance where failure is not an option. The black-phosphate steel construction provides superior corrosion protection in harsh environments, while the UNF fine threading with Class 2A fit ensures precise engagement and vibration resistance in dynamic loading conditions. The integrated flange design eliminates the need for separate washers, distributing clamp load effectively across wider surfaces. These fully threaded fasteners maintain consistent pressure along the entire 2½" length, making them ideal for critical assemblies in construction equipment, heavy machinery, and structural frameworks where 150,000 psi tensile strength and Rockwell C32 hardness are essential for long-term reliability.

Specification Summary & Compliance

This 5/8"-18 hex head screw features precision Class 2A thread fit with UNF fine threading standards, manufactured to exact dimensional requirements. The fastener complies with IFI 111 specifications where identified as SAE J429 Grade 8, ensuring consistent mechanical properties and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to international substance restriction standards for industrial applications.