S-92316A215 1/4"-20 x 3 1/2" 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 150,000 psi tensile strength, 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.
• Secure and precise fit due to the Class 3A thread fit and UNC coarse threading, enabling easier assembly and reducing the risk of cross-threading.
• Enhanced load distribution and stability from the integrated flange, which eliminates the need for a separate washer and provides a larger bearing surface.
• High durability and wear resistance backed by a Rockwell C32 hardness, maintaining structural integrity through repeated use and vibration.
• Convenient installation and removal with an external hex drive and standard 3/8" head width, allowing for use with common wrenches and sockets.
• Compliance with major industry standards including SAE J429, RoHS 3, and REACH, ensuring safety, environmental responsibility, and global acceptance.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where high tensile strength and corrosion resistance are paramount. The black-phosphate steel coating effectively combats rust and degradation, making it ideal for outdoor or chemically exposed environments. Its partially threaded design and UNC coarse thread provide optimal grip and reduce the risk of stripping in softer materials or high-vibration settings. The inclusion of a flange enhances clamping force distribution, preventing joint loosening and minimizing surface damage. By meeting SAE J429 specifications, it ensures consistent performance in industrial fastening applications, from structural frameworks to engine components, delivering reliability and reducing maintenance downtime.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and a UNC thread type with a 1/4"-20 size. It is manufactured in compliance with IFI 111 / SAE J429 for mechanical properties and is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it is free from hazardous substances and suitable for global markets.