S-92316A798 5/8"-11 x 1 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 finish, extending service life in harsh industrial environments.
• Easy installation and high torque capability thanks to the external hex drive and 15/16" head width, allowing for secure tightening with standard tools.
• Optimal thread engagement and vibration resistance from UNC coarse threading and Class 2A thread fit, reducing the risk of loosening in dynamic loads.
• Enhanced load distribution and stability due to the integrated flange, minimizing surface damage and providing a larger bearing area.
• Full threading for maximum fastening versatility along the entire 1 1/2" length, accommodating a wider range of material thicknesses.
• Guaranteed material integrity with Rockwell C32 hardness, ensuring durability and resistance to wear over time.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where failure is not an option. The black-phosphate steel material offers excellent corrosion protection, reducing maintenance needs in exposed or humid conditions. Its UNC coarse thread and Class 2A fit provide quick assembly and reliable hold in coarse-grained materials, while the external hex drive and flange design enable high clamp loads without sinking. Ideal for structural frames, engine components, and industrial equipment, this fully threaded fastener ensures uniform stress distribution, preventing joint fatigue and enhancing overall system safety in heavy-duty applications.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 2A thread fit for consistent engagement and UNC coarse threading (5/8"-11) for robust performance. It meets IFI 111 specifications under SAE J429 for Grade 8 mechanical properties, ensuring 150,000 psi tensile strength and Rockwell C32 hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, supporting safe and sustainable industrial use.