S-90044A168 1/2"-13 x 4" 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.
• Class 3A thread fit provides tighter tolerances for superior vibration resistance and secure fastening in precision assemblies.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in harsh industrial environments.
• Fully threaded design with UNC coarse threads allows for faster installation and maximum grip length in various materials.
• 3/8" hex drive socket head enables high torque application with standard tools, minimizing stripping and improving assembly efficiency.
• Rockwell C37 hardness maintains structural integrity under heavy loads, ensuring durability and repeatable use.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global supply chain requirements.

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, automotive systems, and construction equipment. Its high tensile strength of 170,000 psi and Rockwell C37 hardness prevent deformation under extreme loads, while the Class 3A UNC coarse threads ensure precise, vibration-resistant connections that reduce maintenance needs. The black-oxide surface treatment provides a durable barrier against rust and wear, making it ideal for applications exposed to moisture or chemicals. By integrating fully threaded design and hex drive compatibility, it streamlines installation in tight spaces, enhancing productivity and reliability for engineers and procurement specialists seeking robust high-strength fasteners.

Specification Summary & Compliance

This socket head cap screw features precise Class 3A thread fit with UNC coarse threads (1/2"-13), ensuring accurate engagement and load distribution. Manufactured to ASTM A574 specifications, it meets stringent quality standards for alloy steel fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety requirements for industrial use.