S-91290A131 M20 x 25 mm DIN 912 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh industrial environments, minimizing maintenance needs.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity and drive engagement over repeated use.
• Precise Class 5g6g thread fit with coarse M20x2.5 threads enables quick assembly and secure fastening, improving installation efficiency.
• Fully threaded design offers consistent clamping force along the entire 25mm length, enhancing joint stability in various configurations.
• Standard hex socket drive (17mm) allows for easy installation with common tools, reducing assembly time and tooling complexity.
• Compliance with DIN 912, RoHS 3, and REACH ensures adherence to international quality and environmental standards, supporting global supply chain requirements.

Professional Applications & Engineering Value

This M20 socket head cap screw is engineered to address critical challenges in heavy-duty industrial settings, where vibration, high loads, and corrosive elements can compromise fastener integrity. The black-oxide alloy steel construction, combined with a Class 12.9 strength rating, provides robust resistance to shear and tensile forces, making it ideal for machinery, automotive assemblies, and structural frameworks. The coarse metric thread (M20x2.5) and fully threaded rod design ensure rapid installation and uniform stress distribution, reducing the likelihood of loosening in dynamic applications. By incorporating a standard hex socket drive, it facilitates access in confined spaces, enhancing maintenance efficiency. These features collectively deliver reliable performance in sectors requiring precision industrial fasteners, from manufacturing plants to construction projects.

Specification Summary & Compliance

This product adheres to DIN 912 specifications, with precise Class 5g6g thread fit tolerances for consistent engagement. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental safety and regulatory alignment. The metric coarse thread with a 2.5mm pitch and 25mm length supports standardized industrial applications, backed by the high tensile strength of 170,000 psi and Rockwell C37 hardness for durability.