S-91274A164 1/4"-20 x 3/4" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-flake coating, ensuring long-term reliability in harsh industrial environments.
• Superior tensile strength of 170,000 psi for high-stress applications, reducing the risk of fastener failure.
• Precise Class 3A thread fit for secure, vibration-resistant assemblies with minimal play.
• Rockwell C37 hardness provides excellent wear resistance and durability under repeated use.
• Hex socket drive (3/16") allows for easy installation in confined spaces with standard tools.
• Fully threaded UNC coarse design enables quick assembly and strong holding power.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this zinc-flake-coated alloy steel socket head cap screw delivers robust performance where corrosion and high loads are concerns. The UNC coarse thread and Class 3A fit provide reliable fastening in machinery, automotive, and heavy equipment assemblies, minimizing loosening from vibrations. Its high tensile strength and hardness make it ideal for structural applications, while the hex drive facilitates efficient installation in tight spaces. By meeting ASME B18.3 and ASTM A574 standards, it ensures consistency and safety, reducing downtime and maintenance costs in B2B procurement scenarios.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise tolerances, with UNC coarse threads and a fully threaded design. It conforms to ASME B18.3 and ASTM A574 manufacturing specifications, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met.