S-91251A481 12-24 x 2 1/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress applications.
• Precision Class 3A thread fit guarantees secure, vibration-resistant connections with minimal risk of loosening.
• Rockwell C37 hardness provides excellent wear resistance and durability for repeated use.
• Hex socket drive (5/32") allows for high-torque installation and easy access in confined spaces.
• Fully threaded 12-24 UNC coarse thread design enables deep engagement and faster assembly.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global supply chains.

Professional Applications & Engineering Value

Engineered for precision and reliability, these Black-Oxide Alloy Steel Socket Head Cap Screws address critical industrial challenges such as vibration-induced loosening and corrosion in harsh environments. The 12-24 UNC coarse thread and Class 3A fit provide superior holding power in machinery, automotive assemblies, and heavy equipment, where consistent clamping force is essential. The hex drive design facilitates secure installation with standard tools, reducing assembly time while maintaining high torque capacity. Ideal for applications requiring high tensile strength and corrosion resistance, these screws deliver long-term performance in manufacturing, aerospace, and construction sectors.

Specification Summary & Compliance

This product adheres to Class 3A thread tolerances for precise fit and UNC coarse thread standards. Manufactured in compliance with ASTM A574 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use in industrial applications.