S-90409A128 5/16"-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 tensile strength of 150,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior hardness (Rockwell C32) provides excellent wear resistance and durability, extending the screw's service life in demanding environments.
• Coarse UNC threading with Class 2A fit offers quick assembly and secure fastening, minimizing cross-threading and improving installation efficiency.
• Partially threaded flanged design eliminates the need for separate washers, providing a larger bearing surface for enhanced load distribution and vibration resistance.
• Grade 8 steel construction delivers high fatigue resistance and strength, ideal for heavy-duty machinery and structural applications.
• External hex drive head allows for easy installation and removal with standard tools, reducing labor time and maintenance costs.
• Compliance with IFI 111/SAE J429 standards guarantees consistent quality and interoperability, ensuring reliability in regulated industries.

Professional Applications & Engineering Value

This Grade 8 steel hex head screw is engineered to address critical challenges in industrial settings, such as vibration loosening and high tensile loads. The partially threaded design with a flange provides superior clamping force and stability, preventing joint failure in machinery, construction, and automotive assemblies. Its UNC coarse thread and Class 2A fit ensure quick, secure fastening even in rugged conditions, reducing downtime. Made from high-strength steel with a Rockwell C32 hardness, it resists deformation and corrosion, making it ideal for heavy-duty applications where durability and precision are paramount. The external hex drive facilitates efficient installation, enhancing productivity in maintenance and production lines.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and adheres to UNC thread standards for consistent performance. It meets IFI 111/SAE J429 manufacturing specifications, ensuring high-quality and reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmentally responsible and safe usage in various industrial sectors.