S-91274A420 7/16"-14 x 3 1/2" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the zinc-flake coating extends service life in harsh industrial environments, minimizing maintenance needs.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, enhancing joint integrity.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread form and drive integrity over repeated use.
• 3/8" hex drive design allows for easy installation and high torque application with standard tools, improving assembly efficiency.
• Partially threaded shank enables precise clamping force distribution, ideal for applications requiring controlled grip length.
• Compliance with ASME B18.3 and ASTM A574 guarantees consistent quality and interchangeability, ensuring compatibility with industry standards.

Professional Applications & Engineering Value

This socket head cap screw is engineered to address critical challenges in heavy-duty machinery, automotive, and construction sectors. The zinc-flake-coated alloy steel construction provides robust corrosion resistance, essential for outdoor or chemically exposed environments, while the UNC coarse thread and Class 3A fit ensure rapid assembly and reliable performance under dynamic loads. Its 3 1/2" length and partially threaded design make it suitable for applications requiring precise clamping, such as engine components or structural frames, where vibration loosening is a concern. By combining high tensile strength with standardized dimensions, it reduces downtime and maintenance costs, delivering long-term engineering value in demanding industrial applications.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerance and UNC coarse thread specifications. It meets ASME B18.3 and ASTM A574 manufacturing guidelines, ensuring consistent performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible and safe usage in global markets.