S-90373A136 M20 x 50 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with Class 12.9 strength rating and 170,000 psi tensile strength for critical heavy-duty applications
• Superior wear and deformation resistance thanks to Rockwell C39 hardness, ensuring long-term reliability in demanding environments
• Secure and precise fastening with Class 6g thread fit and coarse 2.5mm pitch for quick installation and vibration resistance
• Full-length threading provides consistent grip strength along the entire 50mm length for uniform load distribution
• Industry-standard compatibility through compliance with ISO 4017/DIN 933 specifications for seamless integration
• External hex drive design enables high-torque installation with standard tools while preventing stripping
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global regulatory acceptance

Professional Applications & Engineering Value

These M20 hex head screws deliver exceptional engineering value in heavy-duty industrial applications where failure is not an option. The Class 12.9 steel construction provides the highest grade of metric fastener strength, making them ideal for structural steel connections, heavy machinery assembly, and high-stress equipment where 170,000 psi tensile strength is required. The fully threaded design ensures maximum engagement in thick materials, while the coarse 2.5mm pitch and Class 6g thread fit prevent cross-threading and maintain integrity under vibration. The external hex drive accommodates high installation torque without compromising the fastener head, making them perfect for maintenance-critical applications in construction, manufacturing, and automotive industries where reliability and compliance with ISO 4017/DIN 933 standards are paramount.

Specification Summary & Compliance

This M20 x 2.5mm hex head screw features precision Class 6g thread tolerance with coarse spacing, ensuring consistent performance across mating components. Manufactured to exacting ISO 4017 and DIN 933 specifications for dimensional accuracy and mechanical properties. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental responsibility and global market acceptance. The fastener maintains 50mm length with fully threaded construction and 12.5mm head height with 30mm across flats for standardized tool compatibility.