S-90044A193 1/2"-20 x 6 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, minimizing the risk of fastener failure.
• Precise Class 3A thread fit provides excellent engagement and vibration resistance in critical assemblies, reducing loosening over time.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in demanding industrial environments.
• Rockwell C37 hardness delivers optimal durability and wear resistance, maintaining thread integrity through repeated use.
• Partially threaded design with 2" minimum thread length allows for secure clamping while simplifying alignment in deep or blind holes.
• 3/8" hex drive socket head enables high-torque installation with standard tools, improving assembly efficiency and reducing strip-out.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global supply chain integration.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these socket head cap screws combine black-oxide alloy steel construction with 1/2"-20 UNF fine threads to address common engineering challenges. The Class 3A thread fit provides superior clamping force distribution in precision machinery, automotive components, and heavy equipment where vibration resistance is critical. The partially threaded shank prevents cross-threading in deep tapped holes while the standard socket head profile accommodates confined spaces. With 170,000 psi tensile strength and corrosion-resistant surface treatment, these fasteners eliminate premature failure points in high-load assemblies, reducing maintenance downtime and ensuring long-term structural integrity across manufacturing, aerospace, and construction sectors.

Specification Summary & Compliance

This socket head cap screw maintains precise Class 3A thread tolerances per UNF standards with 1/2"-20 fine thread configuration and 2" minimum thread length. Manufacturing complies with ASTM A574 specification for alloy steel socket head cap screws. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability.