S-90128A619 3/8"-16 x 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI for reliable performance in high-stress and heavy-duty applications
• Superior corrosion resistance provided by zinc-plated alloy steel, ensuring longevity in harsh industrial environments
• Precise Class 3A thread fit for secure, vibration-resistant connections and reduced risk of loosening
• Fully threaded design offers maximum grip and holding power along the entire screw length
• Hex socket drive allows for high-torque installation and easy access in confined spaces
• Coarse UNC threads enable quick assembly and disassembly, improving operational efficiency
• High hardness rating (Rockwell C37) provides excellent wear resistance and durability under repeated use

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to address critical challenges in industrial assembly and machinery. The zinc-plated alloy steel construction combats corrosion, extending service life in demanding environments like manufacturing plants and outdoor equipment. With a Class 3A thread fit and coarse UNC threads, it ensures tight, reliable fastening that resists vibration-induced loosening—ideal for automotive, aerospace, and heavy machinery applications. The fully threaded and hex drive design facilitates secure installations in tight spaces, enhancing assembly speed and maintenance efficiency while maintaining structural integrity under high loads.

Specification Summary & Compliance

This screw features a 3/8"-16 UNC thread with Class 3A fit for precise dimensional accuracy, and is manufactured to meet ASTM A574 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and regulatory adherence for industrial use.