S-93825A210 M3 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated external-tooth lock washer that bites into surfaces for permanent fastening security
• Exceptional corrosion protection with black zinc plating that withstands harsh industrial environments and extends service life
• High-strength Class 8 rating ensures reliable performance under heavy loads and demanding applications
• Precision Class 6H thread fit provides smooth installation and consistent clamping force without cross-threading
• External hex drive design allows for standard wrenching tools and easy installation in confined spaces
• Coarse metric thread profile enables quick assembly and disassembly while maintaining secure locking
• RoHS 3 compliance meets environmental regulations for use in various industrial sectors

Professional Applications & Engineering Value

This M3 locknut with external-tooth lock washer addresses critical vibration-induced loosening challenges in industrial equipment. The black zinc plated steel construction provides durable corrosion resistance while the integrated locking mechanism creates permanent fastener security without requiring additional components. Engineered with Class 8 strength rating and metric coarse threading, this solution delivers reliable performance in automotive assemblies, machinery frames, electrical enclosures, and construction equipment where constant motion and dynamic loads threaten fastener integrity. The combination of external hex drive and precision Class 6H thread fit ensures straightforward installation and consistent clamping force distribution across mating surfaces.

Specification Summary & Compliance

This locknut features M3 x 0.5 mm metric coarse threads with Class 6H thread fit tolerance, ensuring precise dimensional accuracy according to ISO standards. The assembly includes an integrated external-tooth lock washer (7.1 mm OD) manufactured from steel. The fastener meets Class 8 strength classification requirements and carries full RoHS 3 (2015/863/EU) compliance for environmental regulations. Right-hand threading and standard hex profile (5.5 mm width, 3 mm height) provide compatibility with conventional metric fastener systems and installation tools.