S-91005A041 M20 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced vibration resistance with a 40mm flange diameter that distributes load evenly and prevents loosening under dynamic loads
• Superior corrosion protection from the black-oxide steel finish, extending service life in harsh industrial environments
• Reliable thread engagement with Class 6G thread fit ensuring consistent performance and easy assembly in metric applications
• Quick installation using standard external hex drive, compatible with common wrenches for efficient maintenance
• Durable construction from robust steel material, capable of withstanding high-stress conditions without deformation
• Optimized for coarse threading with M20x2.5 thread, providing strong holding power and resistance to cross-threading
• Environmental compliance meeting RoHS 3 standards, safe for use in regulated industries

Professional Applications & Engineering Value

This M20 flange nut is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in demanding settings. The black-oxide steel construction offers excellent resistance to rust and wear, making it ideal for outdoor machinery, automotive assemblies, and heavy equipment where exposure to moisture and chemicals is frequent. The 40mm flange diameter acts as an integrated washer, reducing the need for additional components and simplifying assembly while providing a larger bearing surface to prevent damage to connected materials. With its Class 6G thread fit and coarse thread pitch, it ensures secure fastening in high-vibration applications like construction frameworks and industrial motors, minimizing maintenance downtime and enhancing operational reliability. This nut's metric hex nut design and external hex drive facilitate easy installation with standard tools, streamlining workflows in manufacturing and repair sectors.

Specification Summary & Compliance

This flange nut features precise M20x2.5 coarse threads with a Class 6G thread fit per metric standards, ensuring dimensional accuracy and reliable performance. It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel, confirming its adherence to environmental and safety regulations. The specifications include a flange diameter of 40mm, thickness of 6mm, width of 30mm, and height of 25mm, designed for consistent quality in industrial fastening applications.