M4 Helical Spring Lock Washer from China
A small M4 helical spring lock washer made of carbon steel, designed for M4 metric bolts to prevent loosening from vibration. It features a split ring that compresses under the bolt head or nut, creating tension. This non-threaded spring washer is classified under tariff item 7318.21.00.
Duty Rate — China → Canada
0%
Import Tips
• Accurately declare the metric size (M4) on the customs documentation to avoid classification errors
• Verify the carbon steel composition and consider whether preferential duty rates apply
• Keep the washers packaged and labeled clearly for efficient CBSA processing