S-92316A315 5/16"-18 x 7/8" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance in high-stress industrial applications.
• Superior corrosion resistance from the black phosphate steel coating, extending service life in harsh environments and reducing maintenance needs.
• Efficient installation and removal thanks to the external hex drive and coarse UNC threads, allowing for quick assembly with standard tools.
• Enhanced load distribution and stability provided by the integrated flange, minimizing the risk of loosening under vibration and improving joint integrity.
• Precise thread fit with Class 2A tolerance, ensuring consistent engagement and reducing the chance of cross-threading during installation.
• Full threading along the 7/8" length offers maximum grip and adjustability, ideal for applications requiring deep penetration and secure fastening.
• Compliance with industry standards including SAE J429, RoHS 3, and REACH, guaranteeing safety, quality, and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered from black-phosphate steel to address critical challenges in heavy machinery, automotive, and construction sectors. Its high tensile strength and Rockwell C32 hardness prevent shear and failure under extreme loads, while the UNC coarse threads and external hex drive enable rapid, tool-friendly installation—reducing labor time and errors. The flanged design eliminates the need for separate washers, providing uniform clamping force and resisting loosening in vibratory environments. Fully threaded for versatile grip, it ensures secure fastening in structural assemblies, making it a reliable choice for engineers seeking durability and compliance with SAE J429 standards in industrial fasteners.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and UNC coarse threads with a 5/16"-18 size, manufactured to SAE J429 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use.