S-90923A231 M3 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated external-tooth lock washers that maintain consistent clamping force in high-motion applications
• Enhanced corrosion protection with black-oxide coating on both 18-8 stainless steel nut and 400 stainless steel washer for harsh industrial environments
• Precision thread engagement with Class 6H metric threads ensuring reliable, consistent performance in automated assembly processes
• Quick installation and removal using standard hex tools, reducing assembly time and maintenance costs
• Dual-material durability combining the strength of 18-8 stainless steel with the spring properties of 400 stainless steel for long service life
• Reliable locking performance even after multiple installations, maintaining secure fastening in vibrating machinery
• Environmental compliance meeting both RoHS 3 and REACH standards for global manufacturing applications

Professional Applications & Engineering Value

These M3 locknuts with external-tooth lock washers solve critical vibration-induced loosening problems in industrial equipment. The black-oxide 18-8 stainless steel construction provides excellent corrosion resistance while the integrated 400 stainless steel washer creates positive locking action that withstands continuous vibration and thermal cycling. Engineered for metric coarse thread applications, these Class 6H precision fasteners deliver consistent performance in automotive assemblies, electrical enclosures, machinery frames, and conveyor systems where vibration resistance is paramount. The right-hand 0.5 mm pitch thread ensures compatibility with standard metric components while the external hex drive simplifies maintenance access in confined spaces.

Specification Summary & Compliance

This M3 x 0.5 mm locknut features Class 6H thread fit per metric standards with coarse thread spacing for optimal engagement. The assembly combines a standard hex 18-8 stainless steel locknut (5.5mm width, 3.3mm height) with an external-tooth lock washer (6.5mm OD) manufactured from 400 series stainless steel. Both components feature black-oxide surface treatment for enhanced corrosion protection. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making it suitable for global industrial applications requiring environmental responsibility.