S-91274A147 M8 x 20 mm ASTM B117, DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the zinc-flake coating provides long-lasting protection against harsh environments, extending service life and reducing maintenance needs.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity and drive engagement through repeated use.
• Precision Class 5g6g thread fit guarantees smooth installation and secure fastening, minimizing assembly time and improving joint reliability.
• Standard hex socket drive with 6mm drive size allows for high torque application and easy access in confined spaces, enhancing installation efficiency.
• Full thread design provides consistent clamping force along the entire length, ensuring even load distribution in critical connections.
• Comprehensive compliance with international standards (ISO 4762, DIN 912) ensures interchangeability and quality consistency across global industrial applications.

Professional Applications & Engineering Value

These Class 12.9 socket head cap screws represent the pinnacle of metric fastener engineering, specifically designed to address critical challenges in heavy machinery, automotive assembly, and precision equipment manufacturing. The zinc-flake-coated alloy steel construction provides superior protection against corrosion while maintaining the high tensile strength required for structural applications. The coarse thread pitch (1.25mm) ensures rapid installation and reliable performance in vibration-prone environments, while the fully threaded design offers maximum engagement in tapped holes or through applications. Engineered to ISO 4762 and DIN 912 specifications, these M8 screws deliver consistent dimensional accuracy and mechanical properties that prevent joint loosening and maintain clamping force integrity in the most demanding industrial applications.

Specification Summary & Compliance

This socket head cap screw features precise M8 x 1.25mm coarse threads with Class 5g6g thread fit tolerance, ensuring compatibility with standard metric components. The fastener is manufactured to ISO 4762 and DIN 912 dimensional standards and meets ASTM B117 testing requirements for corrosion resistance. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and restricted substance adherence for global market acceptance.