S-91274A154 M8 x 40 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 zinc-flake coating extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precise fastening control with a partially threaded design allows for accurate clamping force and secure joint assembly.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity over repeated use.
• Standard hex drive compatibility with 6mm key enables easy installation and removal, streamlining assembly processes.
• Compliance with international standards (ISO 4762/DIN 912) guarantees dimensional accuracy and interchangeability for global projects.
• Environmental regulation adherence (RoHS 3, REACH) ensures safe, sustainable use without hazardous substances.

Professional Applications & Engineering Value

This M8 socket head cap screw is engineered for demanding industrial applications where reliability and durability are critical. The Class 12.9 alloy steel construction, combined with a zinc-flake coating, addresses common issues like corrosion and material fatigue in machinery, automotive, and heavy equipment assemblies. Its partially threaded metric design ensures optimal load distribution and vibration resistance, preventing loosening in dynamic environments. By meeting ISO 4762 and DIN 912 specifications, it provides consistent performance in precision engineering, reducing downtime and enhancing operational safety. Ideal for use in high-strength fastening scenarios, this screw delivers long-term value by withstanding extreme conditions while maintaining thread integrity and ease of maintenance.

Specification Summary & Compliance

This product features precise M8 x 1.25 mm coarse threads with a Class 5g6g thread fit for accurate engagement and tolerance. It complies with ISO 4762 and DIN 912 standards for dimensional consistency, and meets ASTM B117 for corrosion testing. Additionally, it is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence in industrial use.