S-90128A513 5/8"-11 x 1 1/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust in harsh industrial environments
• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme mechanical loads
• Precise thread engagement with Class 3A fit provides vibration resistance and prevents loosening
• High hardness rating (Rockwell C37) maintains structural integrity and prevents thread deformation
• Optimized drive efficiency with 1/2" hex socket for maximum torque transfer and installation control
• Versatile coarse threading (UNC 5/8"-11) enables quick assembly and superior performance in high-vibration applications
• Full thread coverage along the 1-1/4" length ensures consistent clamping force distribution

Professional Applications & Engineering Value

These zinc-plated alloy steel socket head cap screws deliver critical performance advantages for demanding industrial applications. The combination of ASTM A574 compliance and 170,000 psi tensile strength makes them ideal for heavy machinery, automotive assemblies, and structural frameworks where failure is not an option. The Class 3A thread fit with UNC coarse spacing provides exceptional resistance to vibrational loosening while enabling faster installation in production environments. The standard socket head profile with 1/2" hex drive allows for high-torque applications in confined spaces, solving accessibility challenges common in equipment maintenance and manufacturing assembly lines.

Specification Summary & Compliance

Manufactured to ASTM A574 specifications with precision Class 3A thread fit and UNC 5/8"-11 coarse thread spacing. The fasteners feature Rockwell C37 hardness and maintain dimensional accuracy per industrial standards. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.