S-91274A020 6-32 x 3/4" 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 applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc-flake coating extends service life in harsh industrial environments, minimizing maintenance and replacement costs.
• Precision Class 3A thread fit provides secure, vibration-resistant connections for improved assembly integrity and reduced loosening over time.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated installation and removal cycles.
• Hex socket drive design allows for high torque application and easy installation in confined spaces, enhancing assembly efficiency.
• Full thread coverage ensures maximum grip length and uniform load distribution across the entire fastener.
• Compliance with multiple industry standards guarantees consistent quality and reliability for critical engineering applications.

Professional Applications & Engineering Value

These zinc-flake-coated alloy steel socket head cap screws are engineered to address common industrial challenges where corrosion resistance and mechanical reliability are paramount. The combination of 170,000 psi tensile strength and Rockwell C37 hardness makes them ideal for demanding applications in machinery, automotive assemblies, and precision equipment where vibration and dynamic loads are concerns. The 6-32 UNC coarse thread configuration provides excellent engagement in various materials, while the zinc-flake coating offers superior protection against rust and chemical exposure, significantly extending service life in challenging environments. The hex socket drive enables high-torque installation without stripping, ensuring secure fastening in space-constrained applications where wrench clearance is limited.

Specification Summary & Compliance

This socket head cap screw features precision Class 3A thread fit with 6-32 UNC coarse threads and right-hand thread direction. Manufacturing complies with ASME B18.3, ASTM A574 alloy steel specifications, and ASTM B117 salt spray testing standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.