S-90128A662 3/8"-16 x 7" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from zinc plating protects against rust and environmental degradation, extending service life in harsh industrial settings.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening in machinery and equipment.
• Partially threaded design with a minimum 1-1/2" thread length allows for optimal clamping force control and easier alignment in structural joints.
• High hardness (Rockwell C37) enhances wear resistance and durability, maintaining thread integrity through repeated use and torque applications.
• 5/16" hex drive compatibility offers efficient installation with standard tools, speeding up assembly while reducing stripping risks.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and adherence to global industrial standards.

Professional Applications & Engineering Value

These zinc-plated alloy steel socket head cap screws are engineered to address critical challenges in heavy-duty industrial environments, such as vibration-induced loosening and corrosion. The UNC coarse thread and Class 3A fit provide superior engagement in metals and composites, ideal for machinery, automotive frames, and construction equipment where high tensile strength and durability are paramount. The partially threaded rod type allows precise load distribution, reducing stress concentrations in bolted joints. With a Rockwell C37 hardness and 170,000 psi tensile strength, these screws maintain integrity under dynamic loads, ensuring long-term reliability in industrial socket screw applications without compromising on regulatory compliance.

Specification Summary & Compliance

This product meets ASTM A574 specifications for high-strength socket head cap screws, with a Class 3A thread fit ensuring precise dimensional accuracy and UNC coarse threads for robust fastening. It 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.