S-92316A538 1/4"-20 x 5/8" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-phosphate steel coating extends service life in harsh industrial environments.
• High hardness rating (Rockwell C32) provides excellent wear resistance, maintaining thread integrity through repeated use.
• Integrated flange design eliminates the need for separate washers, simplifying installation and improving load distribution.
• Coarse UNC threading with Class 2A fit allows for quicker assembly and better performance in materials prone to stripping.
• Full threading along the 5/8" length offers maximum grip and adjustment flexibility in various material thicknesses.
• Compliance with industry standards including SAE J429, RoHS 3, and REACH ensures product reliability and environmental safety.

Professional Applications & Engineering Value

Engineered for heavy-duty applications, this Grade 8 hex head screw delivers critical performance where failure is not an option. The black-phosphate steel construction provides a durable barrier against rust and corrosion, making it ideal for automotive, construction, and machinery assemblies exposed to moisture or chemicals. Its UNC coarse thread spacing and Class 2A thread fit ensure secure fastening in soft metals or plastics, reducing cross-threading risks. The external hex drive and flanged head offer superior torque transmission and stability, minimizing loosening under vibration. By integrating high tensile strength with corrosion-resistant properties, this fastener solves common issues of bolt fatigue and environmental degradation in industrial settings.

Specification Summary & Compliance

This screw features precise 1/4"-20 UNC threads with Class 2A fit for consistent engagement and tolerance. It meets IFI 111/SAE J429 specifications for Grade 8 fasteners, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, supporting safe and sustainable industrial use.