S-90409A131 3/8"-16 x 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 provides reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• High hardness rating (Rockwell C32) ensures superior wear resistance and durability, extending the service life of your assemblies.
• Integrated flange design eliminates the need for a separate washer, simplifying installation and providing a larger bearing surface for improved load distribution.
• Coarse UNC threading with Class 2A fit offers faster assembly and superior resistance to vibration loosening in demanding environments.
• Full threading along the entire 3/4" length allows for maximum grip and adjustability in various material thicknesses.
• External hex drive and hex head facilitate easy installation and high torque application with standard tools, speeding up assembly processes.
• Compliance with SAE J429, RoHS 3, and REACH guarantees material quality, environmental safety, and adherence to recognized industrial standards.

Professional Applications & Engineering Value

This Grade 8 steel hex head screw is engineered to solve critical challenges in heavy machinery, automotive, and construction sectors where high tensile strength and vibration resistance are paramount. The fully threaded design and coarse UNC thread ensure rapid installation and secure fastening in thick materials or components subject to dynamic loads. The flanged head distributes clamping force effectively, preventing surface damage and maintaining joint integrity under stress. Its Rockwell C32 hardness and 150,000 psi tensile strength make it ideal for bolting applications that demand reliability and long-term performance without corrosion or material degradation concerns, supported by full compliance with major industry and environmental regulations.

Specification Summary & Compliance

This fastener features a 3/8"-16 UNC coarse thread with a Class 2A thread fit for consistent dimensional accuracy and ease of assembly. It meets the mechanical requirements of IFI 111 / SAE J429 for Grade 8 fasteners, ensuring reliable performance under specified loads. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and adherence to environmental safety standards for industrial use.