S-92316A805 5/8"-11 x 2 3/4" 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 and maintains thread integrity under repeated use.
• Precise Class 2A thread fit with UNC coarse spacing allows for faster assembly and reduced cross-threading in heavy machinery.
• Integrated flange design eliminates the need for separate washers, simplifying installation and distributing load more effectively.
• Partial threading offers optimal grip length for materials where full threading isn't required, enhancing versatility.
• Compliance with major standards including SAE J429, RoHS 3, and REACH ensures material safety and interoperability in regulated industries.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in construction, machinery assembly, and automotive sectors where vibration and dynamic loads are common. The black-phosphate steel construction combined with a Rockwell C32 hardness provides a robust solution against wear and environmental degradation. Its UNC coarse thread and Class 2A fit facilitate quick, secure fastening in coarse-grained materials, minimizing installation time while maximizing holding power. The partially threaded and flanged design ensures even pressure distribution and reduces the risk of joint loosening, making it ideal for structural frames, engine components, and heavy equipment that demand high tensile strength and long-term reliability.

Specification Summary & Compliance

This 5/8"-11 hex head screw adheres to Class 2A thread fit tolerances and UNC coarse thread standards, ensuring dimensional accuracy and compatibility. It meets SAE J429 specifications for Grade 8 fasteners, guaranteeing consistent mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various industrial and international markets.