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HSChapter 84
U.S. imports of mechanical seals (HS 848420) totaled $32.4M in April 2026, traded with 52 countries.
Importers of Mechanical Seals paid $3.1M in duties in April 2026 — an effective duty rate of 15% on $19.9M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataMechanical seals — precision face-seal assemblies used to prevent fluid leakage along rotating shafts in pumps, compressors, and mixers — are a specialized industrial product where performance specifications (pressure rating, face material, temperature range) drive sourcing decisions as much as price. Mexico and Germany are the leading US import sources, reflecting both nearshore automotive and industrial supply chains and European engineering expertise. All imports under this heading enter under a single 10-digit line (8484200000), making the classification boundary with lip seals (which are generally elastomeric and classified elsewhere) a recurring customs question. Sweden and the United Kingdom are also notable suppliers, consistent with the heading's concentration among high-precision engineering exporters.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A mechanical seal (8484200000) operates through two precision-lapped flat faces — one rotating, one stationary — held in contact by a spring, creating a fluid-tight barrier along a rotating shaft. A lip seal, by contrast, uses a flexible elastomeric lip pressed against the shaft and is generally classified outside heading 8484.20. The key distinction is the face-contact sealing mechanism versus a radial-lip contact mechanism.
Importers should secure technical datasheets from the manufacturer describing the sealing mechanism, face materials (e.g., silicon carbide, carbon), and operating parameters. This documentation helps demonstrate that the article meets the mechanical-seal definition and is not a simple gasket or elastomeric seal, which would be classified under different headings. A licensed customs broker can assist in evaluating whether the technical specifications align with the 8484.20 heading.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $2.5M | $12.0M | +$9.4M |
| MEXICO | $7.2M | $4.0M | -$3.2M |
| GERMANY | $5.2M | $4.6M | -$650K |
| UNITED KINGDOM | $5.1M | $2.3M | -$2.8M |
| CHINA | $1.4M | $2.7M | +$1.4M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8484200000 | MECHANICAL SEALS | $32.4M | 15.33% | $3.1M |
MECHANICAL SEALS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8484200000 | MECHANICAL SEALS | $52.2M |
MECHANICAL SEALS
592.1K no
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CLEVELAND, OH | $2.5M | $7.7M | +$5.2M |
| NEW ORLEANS, LA | $3.0M | $7.1M | +$4.1M |
| ANCHORAGE, AK | $2.1M | $4.2M | +$2.1M |