HS Code for Rubber Gaskets and O-Rings
The HS Code for rubber gaskets and o-rings is 401693. The MFN duty rate for importing to the US is 2.5%.
| HS Code (6-digit) | 401693 |
|---|---|
| US Duty Rate (MFN) | 2.5% |
| EU Duty Rate (MFN) | 3% |
| Chapter | 40 |
| Heading | 4016 |
| Last Updated | 2026-05 |
Description
Gaskets, washers and other seals of vulcanized rubber
HS Code 401693 covers vulcanized rubber gaskets, washers, and seals with a 2.5% US duty rate.
Frequently Asked Questions
How does the specific vulcanization process affect the classification of rubber gaskets and O-rings under HTS 4016.93?
Classification under HTS 4016.93 is strictly reserved for gaskets and seals made of vulcanized rubber, meaning the rubber has been chemically treated with heat and sulfur to create cross-links, making it non-thermoplastic. If the gasket or O-ring is made from non-vulcanized rubber, thermoplastic elastomers (TPE), or silicone rubber that has not undergone this specific vulcanization process, it would likely be classified elsewhere, such as in heading 3916 or 3926. Properly identifying the material's manufacturing process is therefore essential for accurate classification and duty assessment.
Why are shipments of vulcanized rubber gaskets and O-rings under HTS 401693 frequently targeted for customs inspection?
Customs authorities frequently inspect these shipments to verify the correct tariff classification, as rubber seals are often misclassified under similar headings for mechanical parts or plastics. Inspectors also check for accurate country of origin marking and may test the material composition to confirm it meets the legal definition of vulcanized rubber.
What are the key cost factors beyond the product price when importing vulcanized rubber gaskets under HTS 401693?
Key additional costs include a Most-Favored-Nation (MFN) import duty, which for this classification is typically 2.5% ad valorem in the United States. You should also budget for Merchandise Processing Fees (MPF), which is 0.3464% of the entered value (minimum $29.93, maximum $649.01), and Harbor Maintenance Fees (HMF) if arriving by vessel, assessed at 0.125% of the cargo value.
Material Variants & Classification
HTS 4016.93 specifically covers 'Gaskets, washers and other seals' of vulcanized rubber other than hard rubber. The classification is material-specific. Seals made of other plastics (e.g., PTFE, silicone rubber) are classified elsewhere, typically in heading 3926 or 3916. For example, certain non-cellular silicone O-rings may fall under 3916.90. Metallic gaskets or those with a metal core belong in Chapter 73 or 84. The essential determinant is that the product must be 'of rubber' as defined in Chapter 40.
Similar & Confused HTS Codes for Rubber Gaskets
Gaskets and O-rings of vulcanized rubber are correctly classified under 4016.93. However, they are often confused with similar items made of non-rubber materials. For example, mechanical gaskets of metal sheeting combined with rubber (e.g., head gaskets) are classified under 8484.10, while gaskets of felt or other nonwoven textiles fall under 5603.00. Additionally, O-rings of plastic (e.g., PTFE) are classified in 3926.90, not in Chapter 40 for rubber goods.
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