S-91236A812 5/8"-11 x 4 1/2" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• High tensile strength of 60,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
• Zinc plating provides excellent corrosion resistance, extending the service life of the screw in various industrial environments.
• Coarse UNC thread and Class 2A fit offer quick assembly and secure fastening, minimizing installation time and improving efficiency.
• Partially threaded design allows for precise clamping force control, ideal for applications requiring specific grip range.
• External hex drive and hex head enable easy installation with standard tools, enhancing usability and reducing labor costs.
• Compliance with ASME B18.2.1 and ASTM A307 standards guarantees consistent quality and interoperability, ensuring reliable performance in engineered systems.
• RoHS 3 and REACH compliance meets environmental regulations, making these screws suitable for global supply chains and sensitive applications.

Professional Applications & Engineering Value

This 5/8"-11 UNC hex head screw is engineered from steel with a zinc-plated finish to address common industrial challenges such as corrosion and mechanical stress. Its coarse thread and Class 2A thread fit provide rapid, secure fastening in heavy-duty applications like construction, machinery assembly, and structural frameworks, where vibration resistance and durability are critical. The partial threading allows for optimal load distribution, preventing joint loosening under dynamic conditions. With a tensile strength of 60,000 psi and Rockwell B69 hardness, it withstands high loads without deformation, reducing maintenance needs and downtime in industrial hex screw applications. Ideal for use in automotive, manufacturing, and infrastructure projects, this screw ensures long-term reliability and compliance with stringent standards.

Specification Summary & Compliance

This product features precise Class 2A thread fit and adheres to UNC thread standards with a size of 5/8"-11. It meets ASME B18.2.1 and ASTM A307 specifications for dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it ensures environmental safety and regulatory adherence for industrial use.