S-90128A647 3/8"-16 x 5" 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.
• Superior corrosion resistance from zinc plating protects against rust and extends service life in harsh industrial environments.
• Precise Class 3A thread fit provides tight, secure fastening with minimal play, enhancing assembly accuracy and vibration resistance.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity and durability under repeated use.
• Hex socket drive design allows for easy installation and removal with standard tools, improving efficiency in maintenance and assembly.
• Coarse UNC threads enable quick engagement and reduced cross-threading risks, speeding up production processes.
• Compliance with ASTM A574 and environmental standards ensures consistent quality and safe use in regulated industries.

Professional Applications & Engineering Value

This 3/8"-16 UNC Socket Head Cap Screw is engineered from zinc-plated alloy steel to address critical industrial challenges, such as vibration-induced loosening and corrosion in demanding settings like machinery, automotive, and construction. The partially threaded design concentrates strength where needed, while the coarse thread and Class 3A fit ensure rapid, secure fastening in materials prone to stress. With a hex drive for tool accessibility, it simplifies maintenance in confined spaces, reducing downtime. Ideal for heavy-duty applications, it combines high tensile strength and hardness to withstand extreme loads, providing long-term reliability and cost savings by minimizing replacements.

Specification Summary & Compliance

This screw features a 3/8"-16 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy, and a 5" length with 1 1/2" minimum thread length. It complies with ASTM A574 manufacturing specifications, ensuring consistent quality and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards for environmental safety and hazardous substance control.