S-91251A757 9/16"-12 x 1 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 industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance provided by the black-oxide 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 operational safety.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and high torque applications.
• Coarse UNC threading allows for faster installation and easier alignment, saving valuable assembly time in production lines.
• Fully threaded design provides consistent clamping force along the entire length, ensuring uniform load distribution in critical joints.
• Comprehensive compliance with ASTM A574, RoHS 3, and REACH regulations ensures material quality and environmental safety for global industrial use.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these black-oxide alloy steel socket head cap screws deliver exceptional performance where corrosion resistance and high strength are paramount. The 9/16"-12 UNC coarse threads with Class 3A fit provide superior engagement in heavy machinery, automotive assemblies, and structural frameworks, preventing loosening under vibration. The hex drive design allows for high torque application in confined spaces, while the fully threaded configuration ensures maximum grip length for critical connections. These fasteners solve common engineering challenges by combining 170,000 psi tensile strength with environmental protection, making them ideal for outdoor equipment, manufacturing systems, and precision instruments where reliability cannot be compromised.

Specification Summary & Compliance

This socket head cap screw maintains precision Class 3A thread tolerances with 9/16"-12 UNC coarse threading and right-hand thread direction. Manufacturing complies with ASTM A574 specification for alloy steel socket head cap screws, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting international environmental and safety standards for industrial components.