S-91251A800 5/8"-11 x 1 3/4" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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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 black-oxide finish extends service life in harsh industrial environments.
- Precise Class 3A thread fit provides excellent engagement and vibration resistance, minimizing loosening over time.
- Coarse UNRC threading allows for faster installation and easier assembly in tough materials.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- Fully threaded design ensures consistent clamping force along the entire length for secure fastening.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global projects.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy machinery, automotive, and construction sectors. The high tensile strength and Rockwell C37 hardness prevent stripping and deformation under extreme loads, while the coarse 5/8"-11 UNRC thread facilitates quick assembly in resilient materials like steel and cast iron. The hex drive design allows for high torque application with standard tools, ensuring tight, reliable connections in confined spaces. Ideal for industrial applications requiring durability and precision, these screws reduce maintenance needs and enhance operational safety by withstanding dynamic stresses and corrosive conditions.
Specification Summary & Compliance
This socket head cap screw features a Class 3A thread fit for precise tolerance, UNRC coarse threading with 5/8"-11 size, and full threading along the 1 3/4" length. Manufactured in compliance with ASTM A574 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental and safety adherence for industrial use.
