S-91251A824 5/8"-11 x 9 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 provided by the black-oxide finish on alloy steel, extending service life in demanding industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening in critical assemblies.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Coarse UNC thread profile allows for faster installation and easier alignment, saving time during assembly.
• Partially threaded design provides optimal grip and clamping force where needed, enhancing joint stability.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global industrial use.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this 5/8"-11 UNC socket head cap screw addresses common challenges like vibration-induced loosening and corrosion in machinery, construction, and automotive assemblies. The black-oxide alloy steel construction provides a durable barrier against moisture and chemicals, while the coarse thread and Class 3A fit ensure quick, secure fastening even in high-vibration environments. Its partially threaded rod design concentrates clamping force effectively, reducing stress concentrations and improving load distribution. Ideal for use in equipment requiring high tensile strength and reliable performance, this fastener meets rigorous standards, making it a trusted choice for engineers seeking longevity and compliance in critical operations.

Specification Summary & Compliance

This socket head cap screw features a 5/8"-11 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy, ensuring consistent performance in industrial assemblies. Manufactured in accordance with ASTM A574 specifications, it guarantees material integrity and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for hazardous substances.