S-91290A118 M8 x 220 mm DIN 912 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Strength & Reliability: Class 12.9 rating and 170,000 psi tensile strength ensure superior load-bearing capacity and resistance to failure in demanding applications.
• Superior Corrosion Resistance: The black-oxide coating on the alloy steel provides a durable protective layer, significantly extending the screw's service life in harsh environments.
• Precision Fit & Easy Assembly: M8 x 1.25mm coarse thread with a Class 5g6g fit offers excellent engagement and faster installation, reducing assembly time and labor costs.
• High Torque Capability: The 6mm hex socket head design allows for high tightening torque with standard tools, providing a secure and vibration-resistant connection.
• Optimized Design for Versatility: The partially threaded 220mm shank provides an unthreaded shoulder for precise component positioning and shear resistance.
• Guaranteed Consistency & Quality: Manufactured in compliance with DIN 912 standards, ensuring dimensional accuracy, thread integrity, and reliable performance batch after batch.
• Safe for Regulated Industries: Compliance with RoHS 3 and REACH regulations makes this screw suitable for use in environmentally conscious and globally regulated markets.

Professional Applications & Engineering Value

This M8 Socket Head Cap Screw is engineered to solve critical fastening challenges in heavy machinery, automation systems, and structural frameworks. The Class 12.9 alloy steel core, hardened to Rockwell C37, provides the necessary high tensile strength to withstand extreme dynamic loads and vibrations without stripping or shearing. The black-oxide surface treatment is not just for appearance; it actively fights corrosion, reducing maintenance downtime in humid or chemically aggressive industrial environments. Its coarse thread (1.25mm pitch) ensures rapid and reliable installation into a variety of materials, while the partially threaded design offers a non-marring clamping section, preventing damage to precision components. This combination of material strength, protective coating, and intelligent design delivers a high-strength fastening solution that enhances the safety, longevity, and reliability of your engineered products.

Specification Summary & Compliance

This fastener features an M8 x 1.25mm coarse thread with a Class 5g6g thread fit, ensuring precise and consistent engagement. It is manufactured to the dimensional and mechanical specifications of the DIN 912 standard. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards for hazardous substances.