S-91251A693 7/16"-14 x 7 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 under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Corrosion-resistant black-oxide finish on alloy steel provides enhanced durability and longevity, ideal for industrial environments where moisture or chemicals are present.
• Precise Class 3A thread fit offers superior engagement and vibration resistance, minimizing loosening and maintaining assembly integrity over time.
• Hex socket drive design allows for easy installation and removal with standard tools, improving efficiency and reducing assembly time in tight spaces.
• Partially threaded shank enables secure clamping without unnecessary thread engagement, optimizing load distribution and preventing joint slippage.
• ASTM A574 certification guarantees consistent quality and mechanical properties, ensuring compliance with rigorous industrial standards for socket head cap screws.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence, making these screws suitable for global supply chains and sensitive applications.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address common industrial challenges such as vibration-induced loosening, corrosion degradation, and high-load requirements. The coarse UNC thread and Class 3A fit provide excellent holding power in materials like steel and cast iron, reducing the need for frequent maintenance in machinery, automotive, and heavy equipment assemblies. The alloy steel construction with Rockwell C37 hardness ensures durability against wear and impact, while the black-oxide surface treatment adds a protective layer against rust and chemical exposure. Ideal for use in construction, manufacturing, and aerospace sectors, these screws deliver reliable performance where precision, strength, and longevity are critical to operational efficiency.

Specification Summary & Compliance

This socket head cap screw features a 7/16"-14 UNC coarse thread with Class 3A thread fit for precise tolerance, ensuring secure fastening in high-vibration environments. It meets ASTM A574 specifications for material and mechanical properties, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable industrial use.