S-91180A559 M8 x 100 mm ISO 8765, DIN 960 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance - Zinc plating provides reliable protection against rust and environmental damage, extending service life in demanding industrial conditions.
• High Tensile Strength for Secure Fastening - Class 8.8 strength grade with 110,000 psi tensile strength ensures robust, vibration-resistant connections in high-stress applications.
• Precision Thread Fit for Consistent Performance - Fine 1 mm pitch and Class 6h thread fit deliver accurate, snug engagement, reducing the risk of loosening or cross-threading.
• Optimized Partial Threading Design - Partially threaded shank allows for controlled clamping force and easier alignment in assemblies requiring unthreaded sections.
• Easy Installation with External Hex Drive - Standard hex head design enables quick, tool-friendly tightening using common wrenches, improving assembly efficiency.
• Compliance with International Standards - Meets ISO 8765, RoHS 3, and REACH regulations, ensuring quality, safety, and environmental responsibility for global supply chains.
• Superior Material Hardness - Rockwell C21 hardness provides excellent wear resistance, maintaining thread integrity through repeated use and high torque applications.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this M8 hex head screw delivers exceptional reliability in machinery, automotive, and structural assemblies. The Class 8.8 steel construction combined with zinc plating addresses critical corrosion and fatigue challenges in outdoor or humid conditions. Its fine 1 mm pitch metric thread and Class 6h thread fit ensure precise engagement in tapped holes, minimizing backlash and vibration-induced failures. The partially threaded design allows optimal stress distribution across fastened components, while the external hex drive facilitates rapid installation with standard tools. Ideal for applications requiring high-strength fasteners with consistent performance under dynamic loads.

Specification Summary & Compliance

This fastener features M8 x 1 mm fine metric thread with Class 6h thread fit tolerance and 100 mm length (22 mm minimum thread length). Manufactured to ISO 8765 specifications with Class 8.8 strength grade, it maintains dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries.