S-90128A305 3/8"-16 x 3 3/4" 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.
• Superior corrosion resistance from zinc plating protects against rust and environmental damage, extending service life in harsh industrial settings.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening in dynamic applications.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated installations.
• Hex socket drive design allows for high torque application and easy installation in confined spaces with standard tools.
• Coarse UNC threading enables quicker assembly and better performance in materials prone to stripping or cross-threading.
• Compliance with ASTM A574 guarantees consistent quality and mechanical properties for critical engineering applications.

Professional Applications & Engineering Value

Engineered for demanding environments, these zinc-plated alloy steel socket head cap screws deliver robust performance where reliability is non-negotiable. The 3/8"-16 UNC coarse thread configuration combined with a Class 3A thread fit ensures rapid, secure fastening in machinery, automotive assemblies, and structural frameworks. The partially threaded design concentrates strength where needed while allowing for clamp load distribution. With 170,000 psi tensile strength and corrosion-resistant plating, they solve common industrial challenges like joint failure, vibration-induced loosening, and environmental degradation. Ideal for heavy-duty equipment, manufacturing jigs, and precision instruments requiring hex drive socket screws that withstand extreme operational stresses without compromising on compliance or durability.

Specification Summary & Compliance

This socket head cap screw features precision 3/8"-16 UNC coarse threads with Class 3A fit for superior thread engagement and dimensional accuracy. Manufactured to ASTM A574 specifications, it ensures consistent mechanical properties and performance. 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 global industrial use.