S-91251A291 12-24 x 5/16" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments and minimizing maintenance needs.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, enhancing joint integrity and operational safety.
• Fully threaded design allows for uniform load distribution and maximum grip length, ideal for applications requiring consistent clamping force.
• Hex socket drive (5/32") enables high-torque installation with standard tools, facilitating quick assembly and reducing installation time.
• Compliance with ASTM A574 guarantees material quality and manufacturing consistency, ensuring reliability for critical engineering projects.
• RoHS 3 and REACH compliance confirms environmental safety and regulatory adherence, supporting sustainable and responsible sourcing.

Professional Applications & Engineering Value

This 12-24 UNC socket head cap screw is engineered to address common industrial challenges such as vibration loosening, corrosion, and high-load demands. The black-oxide alloy steel construction provides a durable, corrosion-resistant surface, making it suitable for machinery, automotive, and aerospace applications where exposure to moisture or chemicals is a concern. The coarse UNC thread and Class 3A fit ensure rapid assembly and secure fastening in materials like steel or aluminum, reducing the need for frequent retightening. With its fully threaded profile and hex drive design, it offers efficient installation and reliable performance in high-stress environments, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 3A thread fit for superior accuracy and UNC coarse threads for robust engagement. It meets ASTM A574 specifications for material and manufacturing quality, ensuring consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for industrial use.