S-90128A528 5/8"-11 x 4 1/2" ASTM A574 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 zinc plating extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and safety.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Partially threaded design allows for optimal clamping force distribution, ideal for applications requiring specific grip lengths.
• 1/2" hex drive compatibility enables easy installation with standard tools, improving efficiency in assembly lines.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety, meeting rigorous industrial standards.

Professional Applications & Engineering Value

These 5/8"-11 UNC Socket Head Cap Screws are engineered to address critical challenges in heavy-duty industrial settings. The zinc-plated alloy steel construction provides robust protection against corrosion, making them suitable for outdoor machinery, automotive assemblies, and construction equipment exposed to moisture and chemicals. The coarse UNC thread and Class 3A fit deliver superior resistance to loosening under vibration, a common issue in dynamic environments like manufacturing plants and transportation systems. With a partially threaded rod type, these screws offer precise engagement in bolted joints, reducing stress concentration and improving load distribution. This design is invaluable in applications requiring high clamping force without compromising fastener integrity, such as in structural frameworks and precision machinery, ensuring long-term reliability and reduced downtime.

Specification Summary & Compliance

This product features a 5/8"-11 UNC coarse thread with Class 3A thread fit for tight tolerances and secure fastening. It adheres to ASTM A574 specifications for high-strength alloy steel socket head cap screws, ensuring consistent material and mechanical properties. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms environmental safety and restricted substance management, supporting sustainable procurement practices.