S-92316A804 5/8"-11 x 2 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength and Grade 8 classification for reliable performance in demanding applications.
• Superior corrosion resistance due to black-phosphate steel coating, extending service life in harsh industrial environments.
• Easy installation and removal with external hex drive and 15/16" head width, allowing for standard wrench use and efficient maintenance.
• Enhanced stability and vibration resistance from the integrated flange design, reducing the need for separate washers and improving joint integrity.
• Consistent thread engagement with UNC coarse threading and Class 2A fit, ensuring smooth assembly and minimizing cross-threading risks.
• High durability backed by Rockwell C32 hardness, providing excellent wear resistance and long-term fastener reliability.
• Full-threaded design for maximum grip along the entire 2 1/2" length, offering versatile fastening in various material thicknesses.

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 protection are paramount. The black-phosphate steel finish combats rust and wear in exposed or humid conditions, while the UNC coarse thread and external hex drive facilitate quick, secure fastening with common tools, reducing installation time. The flanged design distributes clamping force evenly, preventing surface damage and loosening under vibration. Ideal for structural frames, engine components, and industrial equipment, this fully threaded bolt ensures robust connections that withstand extreme loads and environmental stresses, enhancing operational safety and reducing maintenance frequency.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including Class 2A thread fit for consistent tolerance and UNC coarse thread specifications. It meets SAE J429 requirements for Grade 8 mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The manufacturing follows IFI 111 guidelines, guaranteeing reliability for industrial use.