Natural Cork Gasket Washers
These are thin, circular washers made from compressed natural cork used as gaskets in machinery and plumbing to create seals. They fall under HTS 4503.90.20.00 as articles of natural cork specifically shaped as washers. The porous structure of cork provides excellent compressibility and sealing properties.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made from agglomerated cork
Agglomerated cork products, even in washer form, are classified under heading 4504 as worked agglomerated articles.
If rubber-coated or combined with rubber
Washers with significant rubber content are classified by the rubber material in Chapter 40, not cork.
If imported as part of a gasket set for machinery
If presented as components of larger sealing assemblies, they may fall under Chapter 84 as parts of machines.
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Import Tips & Compliance
• Verify the cork is natural (not agglomerated) via supplier certification to avoid reclassification under 4504
• Include material composition documentation; ensure no synthetic binders exceed allowable limits for Chapter 45
• Check for contamination with plastics or rubber, which could shift classification to Chapter 39 or 40
Related Products under HTS 4503.90.20.00
Cork Bottle Stopper Disks
Flat, disk-shaped pieces of natural cork used as stoppers or liners in wine and spirit bottles. Classified under HTS 4503.90.20.00 as cork disks, these provide airtight seals due to cork's elasticity. They are distinct from full cylindrical stoppers.
Cork Speaker Grill Wafers
Thin wafer-like sheets of natural cork cut into disks for use as protective grills on audio speakers. They are classified as cork wafers under HTS 4503.90.20.00 due to their flat, disk form and natural cork composition. Cork's acoustic properties help dampen vibrations.
Natural Cork Coaster Disks
Circular disks of natural cork used as drink coasters to absorb moisture and protect surfaces. These qualify under HTS 4503.90.20.00 as cork disks, valued for their natural water-resistant properties. They are typically 4 inches in diameter and simply cut.
Cork Jar Seal Washers
Ring-shaped washers from natural cork designed to seal glass jars for preserves and canning. Classified as cork washers under HTS 4503.90.20.00, they compress under lid pressure for airtight closure. Ideal for food preservation due to inert properties.
Cork Dialysis Filter Wafers
Ultra-thin natural cork wafers used in medical dialysis equipment as filter spacers. They fit HTS 4503.90.20.00 as cork wafers, leveraging cork's biocompatibility and porosity. Precisely cut for high-purity applications.
Natural Cork Vibration Dampener Disks
Disks of natural cork placed under machinery feet to absorb vibrations and reduce noise. Classified under HTS 4503.90.20.00 as cork disks, they excel due to cork's high damping coefficient. Commonly used in industrial equipment.