S-91251A671 7/16"-14 x 1 1/4" 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 and maintaining integrity in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
• Coarse UNC threading enables faster installation and easier alignment, saving time and labor costs in production settings.
• Durable Rockwell C37 hardness offers excellent wear resistance, maintaining thread integrity through repeated use and high torque applications.
• Standard hex socket drive allows for high torque application with common tools, ensuring easy installation and removal without stripping.
• Full threading along the 1-1/4" length provides uniform clamping force and flexibility in various material thicknesses.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw delivers critical engineering solutions where high strength and corrosion resistance are paramount. The combination of 170,000 psi tensile strength and Rockwell C37 hardness makes it ideal for heavy machinery, automotive assemblies, and structural applications subject to dynamic loads and vibrations. The coarse UNC thread design ensures rapid installation in production lines while maintaining Class 3A fit precision for secure fastening. The black-oxide surface treatment provides an additional layer of protection against oxidation, extending service life in challenging environments without compromising the alloy steel's inherent durability. These characteristics make it a reliable choice for engineers seeking industrial fasteners that balance performance with regulatory compliance.

Specification Summary & Compliance

This socket head cap screw features 7/16"-14 UNC coarse threads with Class 3A fit for precise thread engagement and dimensional accuracy. Manufactured to ASTM A574 specifications, it ensures consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety standards for industrial use worldwide.