S-91274A115 M4 x 8 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 in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the zinc-flake coating extends service life, even in harsh industrial environments.
• High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use.
• Precise Class 5g6g thread fit guarantees smooth installation and secure fastening, minimizing assembly time and errors.
• Standard 3 mm hex drive allows for easy installation with common tools, improving workflow efficiency.
• Fully threaded design offers consistent clamping force along the entire length, enhancing joint stability.
• Compliance with DIN 912 and ISO 4762 ensures dimensional accuracy and interchangeability, supporting global engineering standards.

Professional Applications & Engineering Value

This M4 socket head cap screw is engineered to address critical challenges in demanding applications such as machinery, automotive assemblies, and precision equipment. The Class 12.9 alloy steel construction, combined with a zinc-flake coating, provides exceptional resistance to corrosion and mechanical stress, preventing premature failure in volatile conditions. Its coarse thread (0.7 mm pitch) and right-hand thread direction facilitate quick and secure fastening, reducing installation time while maintaining high clamp load. Ideal for high-strength fastening needs, this screw ensures reliable performance in environments where vibration, heavy loads, and exposure to elements are common, delivering long-term durability and reduced maintenance costs.

Specification Summary & Compliance

This product features a Metric M4 x 0.7 mm coarse thread with a Class 5g6g thread fit for precise tolerance, ensuring consistent performance. It complies with DIN 912 and ISO 4762 standards for dimensional accuracy, and meets ASTM B117 for corrosion testing. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence in industrial use.