S-93474A239 M12 x 90 mm ISO 898-1, DIN 6921 High-Strength Metric Class 10.9 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance provided by zinc yellow-chromate plating extends service life in harsh or outdoor environments.
• High hardness rating (Rockwell C32) enhances wear resistance and maintains thread integrity during repeated use.
• Integrated flange design eliminates the need for a separate washer, simplifying installation and providing a larger bearing surface.
• Coarse thread pitch (1.75mm) allows for faster assembly and better performance in materials prone to stripping or vibration.
• Precision Class 6g thread fit ensures consistent engagement and reduces cross-threading risks in metric assemblies.
• Partially threaded shank offers unthreaded grip length for improved clamping force in jointed materials.

Professional Applications & Engineering Value

This M12 hex head screw is engineered to address critical challenges in industrial fastening, where vibration resistance, high clamp load, and durability are paramount. The Class 10.9 strength grade and zinc yellow-chromate plated steel construction provide a robust solution for heavy machinery, structural steel connections, and automotive assemblies. The flanged design distributes pressure evenly, preventing surface damage and maintaining joint integrity under dynamic loads. Its coarse metric thread and external hex drive enable quick installation with standard tools, reducing assembly time while meeting rigorous ISO 898-1 and DIN 6921 specifications for reliable performance in demanding environments.

Specification Summary & Compliance

This fastener features a metric M12 x 1.75mm coarse thread with Class 6g tolerance for precise fit. It is manufactured in compliance with ISO 898-1 and DIN 6921 standards, ensuring consistent quality and mechanical properties. The partially threaded design includes a 30mm minimum thread length and 90mm overall length. Material and plating conform to industry requirements for performance and environmental safety, supporting use in regulated applications where specification adherence is critical.