Coated Paperboard Flange Washers from Germany
Washers cut from moisture-resistant coated paperboard used between flanges in plumbing and HVAC systems. Classified under HTS 4823.90.60.00 due to being washers of coated paperboard, providing compressible sealing without adhesive. The coating prevents fiber swelling in humid environments.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Document compression strength and water absorption tests to prove suitability as washers/seals
• Label shipments clearly as 'coated paperboard washers for sealing' to prevent confusion with metal products
• Avoid misclassification by ensuring no metal inserts; pure paperboard composition required