S-91251A732 1/2"-13 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 industrial applications, reducing the risk of fastener failure.
• Durable Black-Oxide finish on alloy steel provides enhanced corrosion resistance, extending service life in demanding environments.
• Precision Class 3A thread fit offers superior engagement and vibration resistance, minimizing loosening in critical assemblies.
• Partially threaded design with 1-1/2" minimum thread length allows for optimal clamping force control and simplified alignment in assemblies.
• 3/8" hex drive socket head enables high-torque installation and removal with standard tools, improving assembly efficiency.
• Coarse UNC thread profile facilitates quick assembly and disassembly, reducing labor time in maintenance and production.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global industrial use.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in heavy-duty machinery, automotive, and construction applications. The 1/2"-13 UNC coarse thread and Class 3A fit provide excellent resistance to vibrational loosening, while the partially threaded shank concentrates clamping force precisely where needed. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands extreme loads without deformation. The 3/8" hex drive allows for secure tool engagement in confined spaces, making it ideal for high-stress assemblies requiring reliable, repeatable fastening solutions in industrial settings.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with Class 3A precision tolerance for secure fit. It is manufactured in accordance with ASTM A574 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally regulated markets and applications requiring strict material safety standards.