S-91274A444 1/2"-13 x 1" 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 environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit provides tight tolerances for secure fastening, enhancing assembly integrity and vibration resistance.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity over repeated use.
• 3/8" hex drive design allows for easy installation and removal with standard tools, improving workflow efficiency.
• Coarse UNC threads enable quick assembly and disassembly, saving time in industrial maintenance and production lines.
• Full threading along the 1" length ensures uniform load distribution and versatile fastening options in various material thicknesses.

Professional Applications & Engineering Value

This zinc-flake-coated alloy steel socket head cap screw is engineered to address critical challenges in demanding industrial settings, such as machinery assembly, automotive components, and heavy equipment. The high tensile strength and Class 3A thread fit provide secure, vibration-resistant connections that prevent loosening under dynamic loads. Its corrosion-resistant coating withstands exposure to moisture and chemicals, reducing downtime in corrosive environments. With a coarse UNC thread and 3/8" hex drive, it simplifies installation in tight spaces, making it ideal for applications requiring robust, reliable fasteners that meet stringent performance standards.

Specification Summary & Compliance

This socket head cap screw features a 1/2"-13 UNC coarse thread with Class 3A fit for precise dimensional accuracy. It complies with ASME B18.3 and ASTM A574 manufacturing specifications, ensuring consistent quality and performance. The product meets ASTM B117 for corrosion testing and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in global industrial applications.