S-91270A250 M3 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated spring lock washer that maintains clamping force under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in harsh environments
• High-strength performance meeting Class 8 standards for reliable fastening in demanding applications
• Precise thread engagement with Class 6H thread fit ensuring consistent, secure mating with mating components
• Easy installation and removal using standard external hex drive with familiar 5.5mm width for efficient maintenance
• Optimized for industrial use with coarse metric thread (M3 x 0.5mm) providing quick assembly and disassembly
• Environmental compliance with RoHS 3 standards for safe use across regulated industries

Professional Applications & Engineering Value

This M3 locknut with spring lock washer addresses critical vibration-induced loosening challenges in industrial equipment and machinery. The zinc-plated steel construction provides essential corrosion resistance while maintaining the Class 8 strength rating required for high-stress applications. The integrated steel spring lock washer creates constant tension that compensates for thermal expansion and vibration, preventing spontaneous unfastening in automotive assemblies, manufacturing equipment, and electrical enclosures. The external hex drive with standard profile ensures compatibility with common tools, while the coarse metric thread (0.5mm pitch) facilitates rapid installation in production environments where time efficiency is paramount.

Specification Summary & Compliance

This locknut features M3 x 0.5 mm coarse thread with Class 6H thread fit per metric standards, ensuring precise dimensional accuracy. The assembly combines a standard hex nut profile (5.5mm width, 3.8mm height) with an 8mm OD spring lock washer manufactured from steel. The product meets Class 8 strength requirements and is fully RoHS 3 (2015/863/EU) compliant for environmental safety. All components are right-hand threaded and designed for external hex drive applications following standard industrial specifications.