Gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal; sets or assortments of gaskets and similar joints, dissimilar in composition, put up in pouches, envelopes or similar packings; mechanical seals

Every line of heading 8484

• 8484 Gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal; sets or assortments of gaskets and similar joints, dissimilar in composition, put up in pouches, envelopes or similar packings; mechanical seals.
• 8484.10.00.00 Gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal (No.): General 2.5%; Special Free (A*,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 35%.
• 8484.20.00.00 Mechanical seals (under: Gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal; sets or assortments of gaskets and similar joints, dissimilar in composition, put up in pouches, envelopes or similar packings; mechanical seals) (No.): General 3.9%; Special Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 45%.
• 8484.90.00.00 Other (under: Gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal; sets or assortments of gaskets and similar joints, dissimilar in composition, put up in pouches, envelopes or similar packings; mechanical seals) (No.): General 2.5%; Special Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 35%.

From MFG Calcs data: Gaskets and mechanical seals

U.S. imports of gaskets and mechanical seals (heading 8484) came to $828M in 2025, with $91.3M in calculated duty: an effective duty of 11.0%, every duty included.

Effective duty in Sep 2026: 10.1%, against 13.7% in Sep 2025.

Largest sources in 2025: Mexico $184M at 2.2% effective duty; Germany $127M at 10.9% effective duty; Japan $83.4M at 9.8% effective duty; United Kingdom $52.5M at 7.6% effective duty; China $50.4M at 51.6% effective duty.

These are family totals from U.S. import statistics published through USITC DataWeb, not this heading's rate alone; effective duty is calculated duty as a share of customs value, an estimate, not a ruling.

• Gaskets and mechanical seals: tariffs and imports
• Gaskets and mechanical seals: landed cost by country
• Gaskets and mechanical seals: reshoring outlook

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.