S-90044A297 8-32 x 4 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 in high-stress applications, reducing the risk of fastener failure.
• Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant connections in demanding environments.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in industrial settings.
• Partially threaded design with UNC coarse spacing allows for easier alignment and faster assembly, improving installation efficiency.
• Rockwell C37 hardness delivers excellent wear resistance, maintaining thread integrity over repeated use.
• 9/64" hex drive socket head enables high-torque application with standard tools, minimizing stripping and ensuring firm seating.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global supply chain requirements.

Professional Applications & Engineering Value

These 8-32 UNC thread socket head cap screws are engineered to address critical fastening challenges in heavy-duty machinery, automotive assemblies, and precision equipment. The black-oxide alloy steel construction resists rust and wear, while the Class 3A thread fit ensures minimal backlash and reliable clamping force in high-vibration environments. With a coarse thread spacing and partially threaded shank, they simplify alignment in blind holes and reduce the risk of cross-threading, speeding up maintenance and production cycles. Ideal for applications requiring high tensile strength and durability, these screws provide a robust solution for industrial fastening where performance and compliance are paramount.

Specification Summary & Compliance

This socket head cap screw features precise Class 3A thread fit per UNC standards, with a minimum thread length of 7/8" and right-hand thread direction. Manufactured to ASTM A574 specifications, it ensures consistent quality and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial use.