S-99183A680 M20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through top-lock distorted thread technology that maintains secure fastening under dynamic loads
• Exceptional corrosion protection with black phosphate steel coating that withstands harsh industrial environments
• High-strength performance with Class 10 rating ensuring reliable operation in heavy-duty applications
• Precision thread engagement with Class 6H metric coarse threads providing consistent, reliable fastening
• Easy installation and removal using standard external hex drive compatible with common wrench tools
• Environmental compliance assurance meeting both RoHS 3 and REACH standards for safe industrial use
• Optimized dimensional stability with 30mm width and 20mm height for consistent performance across applications

Professional Applications & Engineering Value

This M20x2.5 mm Class 10 locknut delivers critical vibration resistance where conventional fasteners fail. The distorted thread top-lock technology creates consistent prevailing torque that prevents loosening under extreme vibration and dynamic loading conditions common in heavy machinery, automotive assemblies, and industrial equipment. Manufactured from black phosphate steel, the nut provides enhanced corrosion resistance while maintaining the structural integrity required for Class 10 strength applications. The metric coarse threading (2.5 mm pitch) ensures quick installation and reliable performance in high-stress environments where vibration-induced failure is a primary concern for maintenance engineers and equipment designers.

Specification Summary & Compliance

This metric locknut features precise M20x2.5 mm coarse threads with Class 6H thread fit tolerance, ensuring compatibility with standard metric bolts. The external hex drive (30mm width) provides reliable tool engagement for installation. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, confirming the absence of restricted substances. The Class 10 strength rating certifies the nut's performance in demanding industrial applications where vibration resistance and mechanical reliability are paramount.