S-91263A881 M5 x 22 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength with Class 10.9 rating (120,000 psi) ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc-plated alloy steel construction extends service life in harsh industrial environments, minimizing maintenance needs.
• Precise thread engagement with Class 6g fit and coarse 0.8mm pitch allows for quick, secure installation and reduced cross-threading issues.
• Optimized flush mounting with a standard 90° countersink angle and flat head design provides a smooth, unobtrusive finish in assembled components.
• Enhanced durability backed by Rockwell C32 hardness, offering excellent wear resistance and long-term structural integrity.
• Efficient installation using a 3mm hex drive for easy torque application, speeding up assembly processes without compromising grip.
• Full threading along the 22mm length ensures maximum holding power and uniform load distribution across the fastener.

Professional Applications & Engineering Value

This M5 flat head screw is engineered to address common industrial challenges, such as vibration loosening and corrosion-induced degradation. Made from zinc-plated alloy steel, it provides a robust barrier against moisture and chemicals, ideal for machinery, automotive assemblies, and structural frameworks. The coarse thread with 0.8mm pitch and Class 6g thread fit ensures rapid, secure fastening in materials like metal and hard plastics, reducing installation time while maintaining alignment. Fully threaded and compliant with DIN 7991, it delivers consistent performance in high-vibration environments, preventing joint failure and enhancing operational safety. These features make it a reliable choice for engineers seeking durability and compliance in demanding applications.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 6g thread fit per ISO metric specifications and a 90° countersink angle for seamless integration. It meets DIN 7991 manufacturing norms, ensuring consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing the use of safe, environmentally responsible materials in industrial settings.