S-92865A167 1/2"-13 x 5 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 in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc plating extends service life and maintains integrity in harsh or outdoor environments.
• Grade 5 strength classification and Rockwell C25 hardness provide consistent durability and resistance to wear under heavy loads.
• Coarse UNC threads and Class 2A fit enable quick, secure installation and reduce cross-threading in a variety of materials.
• External hex drive and hex head design allows for high torque application with standard tools, speeding up assembly and disassembly.
• Partial threading offers improved grip and clamping force where full thread engagement is not required, optimizing fastener function.
• Compliance with ASME, SAE, RoHS 3, and REACH ensures product reliability, safety, and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

This 1/2"-13 UNC Grade 5 hex head screw is engineered to address common industrial challenges such as vibration loosening, corrosion, and high tensile demands. Made from zinc plated steel, it provides a protective barrier against moisture and chemicals, making it ideal for construction, machinery assembly, and heavy equipment. The coarse thread and Class 2A thread fit ensure easy alignment and strong holding power in wood, metal, and composite materials, reducing installation time and improving joint integrity. With partial threading, it concentrates clamping force effectively, preventing material damage in applications like structural framing or automotive components. Its external hex drive allows for high-torque fastening, ensuring secure connections in demanding environments where reliability is critical.

Specification Summary & Compliance

This fastener features a 1/2"-13 UNC coarse thread with Class 2A tolerance for precise fit and interchangeability. It meets ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties, including tensile strength and hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in environmentally conscious industries.