S-92316A327 5/16"-24 x 2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 classification and a tensile strength of 150,000 psi, ensuring reliable performance under high stress.
• Superior corrosion resistance provided by the black phosphate steel coating, extending the fastener's service life in harsh industrial environments.
• Precise and secure fastening due to the UNF fine thread and Class 2A fit, minimizing the risk of loosening from vibrations.
• Enhanced load distribution and stability from the integrated flange, eliminating the need for a separate washer and simplifying assembly.
• Optimized for high-torque installation with an external hex drive and hex head design, allowing for easy application with standard tools.
• Versatile partial threading that provides strong grip on materials while allowing for unthreaded shank strength where needed.
• Guaranteed material integrity with a Rockwell C32 hardness, ensuring the screw maintains its form and function under heavy loads.

Professional Applications & Engineering Value

This Grade 8 Hex Head Screw is engineered to solve critical challenges in heavy machinery, automotive, and construction sectors where joint failure is not an option. The black-phosphate steel material offers a robust barrier against rust and corrosion, significantly reducing maintenance needs in outdoor or chemically exposed settings. Its UNF fine thread and Class 2A fit provide superior resistance to vibrational loosening, a common issue in dynamic load applications. The partially threaded and flanged design ensures that the screw can bear shear loads effectively while the flange distributes clamping force evenly, preventing surface damage. Ideal for high-strength industrial fastening, this component delivers reliability where precision and durability are paramount.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 2A thread fit for consistent assembly and UNF fine threading (5/16"-24). It is manufactured in compliance with IFI 111 / SAE J429 specifications, ensuring mechanical properties meet rigorous industry requirements. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, affirming its safety and environmental standards for global industrial use.