M4 External Tooth Lock Washer 304 Stainless Steel DIN6797A (10000pcs/Pkg)

External tooth lock washers feature serrated edges that grip both the fastener and the surface, preventing loosening due to vibration. They distribute load over a larger area, enhancing stability in assemblies. Commonly used in automotive and industrial applications, they ensure reliable fastening and improved performance.

• Free Shipping for orders over $100，Orders below $100 will have a shipping fee applied based on the weight of the items and the ship to location
• Usually ships within 3days, takes around 10days to arrive, shipped by UPS\DHL
• Eligible for Return, Refund or Replacement within 30 days of receipt