Belleville Disc Spring Washer 20mm OD from Japan
A conical steel disc washer that flattens under load to maintain tension and absorb shock. It qualifies under HTS 7318.21.00 as a spring lock washer due to its elastic deformation properties. Used in high-pressure flange and valve applications.
Duty Rate — Japan → United States
15.8%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Provide load/deflection curve data to substantiate spring washer function vs. plain spacers
• Certify steel grade (e.g
• 17-7PH) for high-performance claims during customs valuation
• Separate from gasket sets; declare individually to avoid Chapter 84 machinery parts classification