S-91029A105 M8 x 30 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in the most demanding industrial applications
• Superior corrosion resistance provided by zinc yellow-chromate plating extends service life in harsh environments
• Maximum thread engagement with fully threaded design delivers enhanced clamping force and vibration resistance
• Precision Class 6h thread fit guarantees consistent installation and optimal load distribution
• Heavy-duty Class 12.9 rating offers the highest strength grade for critical fastening applications
• External hex drive design enables high torque application and secure installation with standard tools
• Coarse thread pitch provides faster assembly and reduced cross-threading risk in production environments

Professional Applications & Engineering Value

This M8 hex head screw represents the pinnacle of high-strength fastening technology, specifically engineered for industrial applications where failure is not an option. The Class 12.9 steel construction with Rockwell C39 hardness provides exceptional resistance to shear and tensile forces, making it ideal for heavy machinery, structural steel connections, and automotive assemblies. The zinc yellow-chromate plating creates a robust barrier against corrosion in challenging environments, from manufacturing facilities to outdoor equipment. The fully threaded metric design with coarse 1.25mm pitch ensures rapid installation while maintaining superior holding power, significantly reducing assembly time in production lines. Engineered to ISO 4017/DIN 933 specifications, this external hex drive screw delivers consistent performance across industrial applications requiring precision and reliability.

Specification Summary & Compliance

This metric hex head screw features M8 x 1.25mm coarse thread with Class 6h thread fit tolerance ensuring precise engagement and optimal performance. Manufactured to ISO 4017/DIN 933 standards with complete dimensional compliance, including 13mm head width and 30mm length. The fastener meets Class 12.9 strength requirements with verified 170,000 psi tensile strength and Rockwell C39 hardness. The zinc yellow-chromate plating provides corrosion protection while maintaining compliance with industrial specifications for heavy-duty applications.