S-91274A452 1/2"-13 x 1 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 environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, enhancing assembly integrity and safety.
• High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use and adjustments.
• Standard hex drive (3/8") allows for easy installation and removal with common tools, improving workflow efficiency.
• Fully threaded design offers consistent clamping force along the entire length, ideal for applications requiring uniform pressure distribution.
• Compliance with ASME B18.3 and ASTM A574 ensures consistent quality and interchangeability, supporting standardized engineering practices.

Professional Applications & Engineering Value

This zinc-flake-coated alloy steel socket head cap screw is engineered to address critical challenges in demanding industrial settings. Its high tensile strength and Rockwell C37 hardness make it suitable for heavy machinery, automotive assemblies, and structural applications where vibration and dynamic loads are common. The UNC coarse thread and Class 3A fit provide superior grip in soft materials or when rapid assembly is needed, reducing the risk of cross-threading. Combined with the corrosion-resistant zinc-flake coating, it delivers long-term reliability in outdoor or chemically exposed environments, minimizing downtime and maintenance. Ideal for OEMs and MRO professionals, this fastener ensures durable, precision performance in high-stress engineering applications.

Specification Summary & Compliance

This socket head cap screw features a 1/2"-13 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy. It is manufactured in accordance with ASME B18.3 and ASTM A574 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible and safe usage in global markets.