S-91251A979 1 1/2"-6 x 14" 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 from the black-oxide finish extends service life in harsh environments, minimizing maintenance and replacement costs.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity and drive engagement over repeated use.
• Coarse UNRC thread with Class 2A fit allows for faster assembly and better vibration resistance in heavy machinery and structural applications.
• Partially threaded design offers precise clamping control, ideal for applications where unthreaded shank strength is critical.
• 1" hex drive socket head enables high-torque installation with standard tools, ensuring secure fastening in confined spaces.
• Compliance with ASTM A574 and environmental regulations (RoHS 3, REACH) guarantees material consistency and safe use across global markets.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, construction equipment, and automotive frameworks. The coarse UNRC thread and Class 2A fit provide rapid installation and enhanced resistance to loosening under dynamic loads, while the partially threaded rod type ensures optimal stress distribution. The black-oxide surface treatment significantly improves corrosion resistance, making it suitable for outdoor or humid environments where durability is paramount. With a 14" length and 1" hex drive, it accommodates high-torque applications in tight spaces, delivering reliable performance in demanding engineering projects that require ASTM A574 compliance and superior tensile strength.

Specification Summary & Compliance

This socket head cap screw features a 1 1/2"-6 UNRC coarse thread with Class 2A dimensional tolerance for consistent fit and assembly. It is manufactured in accordance with ASTM A574 specifications, ensuring material quality and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.