S-91251A724 1/2"-13 x 3" 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 applications, reducing the risk of fastener failure.
• Precise Class 3A thread fit provides superior engagement and vibration resistance, maintaining joint integrity in demanding environments.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in various industrial conditions.
• 3/8" hex drive design allows for high torque application and easy installation with standard tools, improving assembly efficiency.
• Partially threaded shank enables precise clamping force control, ideal for applications requiring specific unthreaded grip lengths.
• Rockwell C37 hardness ensures excellent wear resistance and durability under repeated loading and harsh operating conditions.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency, environmental safety, and regulatory acceptance for global supply chains.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these socket head cap screws deliver critical performance where standard fasteners fall short. The black-oxide alloy steel construction provides superior resistance to rust and wear, making them ideal for machinery, automotive assemblies, and construction equipment exposed to harsh environments. The 1/2"-13 UNC coarse thread ensures quick assembly and reliable holding power in soft materials or where vibration is a concern. With a 3/8" hex drive, installers can apply high torque without slippage, reducing installation time and tool wear. These screws are specifically designed to solve common engineering challenges like joint loosening, material fatigue, and compliance requirements in global manufacturing settings.

Specification Summary & Compliance

This socket head cap screw features a 1/2"-13 UNC coarse thread with Class 3A fit for precise dimensional accuracy and optimal thread engagement. It is manufactured in accordance with ASTM A574 specifications, ensuring consistent material properties and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally sensitive and regulated industries without hazardous substance restrictions.