S-92865A109 5/16"-24 x 1 1/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the zinc plating extends service life and maintains integrity in harsh or outdoor environments.
• Precise Class 2A thread fit with UNF fine threads provides secure, vibration-resistant connections, minimizing loosening over time.
• High hardness (Rockwell C25) offers excellent wear resistance, maintaining thread integrity through repeated assembly and disassembly.
• Full threading design allows for maximum grip length and uniform load distribution, enhancing joint stability in various materials.
• External hex drive and hex head facilitate easy installation and high torque application with standard tools, speeding up assembly processes.
• Compliance with industry standards including ASME B18.2.1 and SAE J429 ensures consistent quality and interoperability in industrial systems.

Professional Applications & Engineering Value

This Grade 5 steel hex head screw is engineered to address critical fastening challenges in heavy-duty industrial settings. The UNF fine thread and Class 2A fit deliver superior clamping force and vibration resistance, making it ideal for machinery, automotive assemblies, and structural frameworks where loosening could lead to operational failures. The zinc plated finish combats corrosion, prolonging lifespan in humid or chemically exposed environments. With a tensile strength of 120,000 psi and full threading, it ensures even stress distribution and reliable performance in high-load applications, reducing maintenance needs and downtime. These screws are a trusted solution for engineers seeking durability, compliance, and efficiency in industrial fasteners.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including Class 2A thread fit and UNF fine thread standards, ensuring consistent performance and ease of assembly. It meets ASME B18.2.1 and SAE J429 specifications for grade and manufacturing quality. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and suitability for global industrial use.