S-91274A060 8-32 x 5/8" ASME B18.3, ASTM A574, ASTM B117 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.
• Superior corrosion resistance from zinc-flake coating extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precision Class 3A thread fit provides tight tolerances and secure fastening, enhancing assembly integrity and vibration resistance.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and disassembly.
• Hex socket drive design allows for easy installation with standard tools, improving efficiency in tight spaces and reducing assembly time.
• Full thread coverage ensures consistent grip along the entire 5/8" length, providing uniform clamping force and stability.
• Compliance with industry standards including ASME B18.3 and ASTM A574 guarantees consistent quality and interoperability in professional settings.

Professional Applications & Engineering Value

This 8-32 UNC socket head cap screw is engineered to address critical challenges in demanding industrial environments. The zinc-flake-coated alloy steel construction delivers robust corrosion resistance, making it ideal for machinery, automotive assemblies, and outdoor equipment where exposure to moisture and chemicals is common. The coarse thread spacing and Class 3A thread fit ensure quick installation and reliable holding power, reducing assembly errors and enhancing structural stability. With a tensile strength of 170,000 psi and Rockwell C37 hardness, it withstands heavy loads and repetitive stress, minimizing downtime in production lines. The hex drive socket head design facilitates access in confined spaces, streamlining maintenance and repair operations for engineers and technicians.

Specification Summary & Compliance

This fastener features precise UNC thread with Class 3A fit and coarse thread spacing, ensuring dimensional accuracy per ASME B18.3 specifications. Manufactured from alloy steel under ASTM A574 and tested for corrosion resistance per ASTM B117. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety standards for industrial use.