What is the U.S. tariff rate on gaskets and mechanical seals?

USITC calculated duties imply an effective rate of 9.61% in Jun 2026 (calculated duties ÷ covered customs value, USITC DataWeb). The parseable Column 1 General line-rate range is 2.5%–3.9%; individual lines are called “Free” only when the official General field is literally Free, and product, origin, preference and tariff mix can contribute to the observed-rate difference.

What are the statutory MFN line rates for gaskets and mechanical seals?

The parseable Column 1 General line-rate range is 2.5%–3.9% across the family's 3 eight-digit HTS lines in the 2026 Harmonized Tariff Schedule (headings 8484). “Free” means the official General field is literally Free for a line; it does not determine final entry liability.

Which countries supply the most gaskets and mechanical seals to the U.S.?

Top retained sources in 2025: Mexico ($184.3M at 2.23%), Germany ($127.1M at 10.86%), Japan ($83.4M at 9.84%). Mexico holds 22.3% of total family import customs value. Retained sources cover 81.3%; their HHI is 1000, a lower bound whose floor falls in the diversified range without classifying the omitted tail.

How much gaskets and mechanical seals does the U.S. import?

$828.3M of customs value in 2025, with $91.3M in USITC Calculated Duties — an effective calculated-duty rate of 11.03%.

Is the U.S. a net importer of gaskets and mechanical seals?

No — a net exporter in 2025: $828.3M imported vs $1.2B exported.

What is the customs unit value of gaskets and mechanical seals?

$3.26/unit in 2025, derived as customs value ÷ reported quantity from USITC DataWeb. It is an aggregate across the family's product and origin mix, not a transaction price or supplier quote.

Tariff monitor · Machinery & Equipment

Gaskets and Mechanical Seals: Statutory & Effective Tariff Rates

USITC Column 1 General rates for 3 gaskets and mechanical seals HTS lines (parseable range 2.5%–3.9%). Effective rate Jun 2026: 9.61%; monthly history since 2014.

The short answer

The observed effective calculated-duty rate on U.S. imports of gaskets and mechanical seals was 9.61% in Jun 2026, down from 11.18% a year earlier — USITC Calculated Duties divided by covered customs value. The Column 1 General line-rate range is 2.5%–3.9% across 3 HTS lines in the 2026 schedule; individual lines are called “Free” only when the official General field is literally Free, which still does not determine a shipment’s final duty. Mexico is the largest source, holding 22.3% of 2025 imports.

Statutory rates from the schedule

Metal and composite gaskets and mechanical face seals — the static and rotating seals that keep fluids where they belong. This family covers HTS heading 8484: 3 eight-digit rate lines with a parseable Column 1 General range of 2.5%–3.9% in the 2026 schedule. “Free” means the official General field is literally Free for that line; it does not determine final entry liability.

Observed calculated-duty data

Latest month on record (2026-06): 9.61% effective on $81.3M of imports, versus 11.18% in the same month a year earlier. The monthly archive holds 150 observations from 2014-01 through 2026-06.
In 2025, U.S. imports for consumption in this family totaled $828.3M in customs value, with $91.3M in USITC reported calculated duty on $828.3M of covered customs value: an effective calculated-duty rate of 11.03%. The aggregate reflects the recorded entry mix but does not attribute the result to a specific legal provision.
A year earlier the effective calculated-duty rate was 3.83%, so the observed rate rose 7.2 points.
Top source countries in 2025: Mexico ($184.3M at 2.23%), Germany ($127.1M at 10.86%), Japan ($83.4M at 9.84%), United Kingdom ($52.5M at 7.63%), China ($50.4M at 51.63%).
Reported freight and insurance equaled 3.15% of covered customs value in 2025 ($21.2M total); charge coverage was 81.3% of customs value, from USITC DataWeb. It is shown alongside the effective calculated-duty rate and is not part of the customs-value duty base.
Customs unit value: 3.2609 per unit in 2025, aggregate declared customs value divided by reported quantity across eligible single-unit lines (USITC DataWeb); not a transaction price.

Representative rate lines

8484.10.00.00: Gaskets and similar joints of metal sheeting combined with other material or of two or mor · MFN 2.5%
8484.20.00.00: Mechanical seals · MFN 3.9%
8484.90.00.00: Other · MFN 2.5%

Frequently asked questions

What is the U.S. tariff rate on gaskets and mechanical seals? USITC calculated duties imply an effective rate of 9.61% in Jun 2026 (calculated duties ÷ covered customs value, USITC DataWeb). The parseable Column 1 General line-rate range is 2.5%–3.9%; individual lines are called “Free” only when the official General field is literally Free, and product, origin, preference and tariff mix can contribute to the observed-rate difference.
What are the statutory MFN line rates for gaskets and mechanical seals? The parseable Column 1 General line-rate range is 2.5%–3.9% across the family's 3 eight-digit HTS lines in the 2026 Harmonized Tariff Schedule (headings 8484). “Free” means the official General field is literally Free for a line; it does not determine final entry liability.
Which countries supply the most gaskets and mechanical seals to the U.S.? Top retained sources in 2025: Mexico ($184.3M at 2.23%), Germany ($127.1M at 10.86%), Japan ($83.4M at 9.84%). Mexico holds 22.3% of total family import customs value. Retained sources cover 81.3%; their HHI is 1000, a lower bound whose floor falls in the diversified range without classifying the omitted tail.
How much gaskets and mechanical seals does the U.S. import? $828.3M of customs value in 2025, with $91.3M in USITC Calculated Duties — an effective calculated-duty rate of 11.03%.
Is the U.S. a net importer of gaskets and mechanical seals? No — a net exporter in 2025: $828.3M imported vs $1.2B exported.
What is the customs unit value of gaskets and mechanical seals? $3.26/unit in 2025, derived as customs value ÷ reported quantity from USITC DataWeb. It is an aggregate across the family's product and origin mix, not a transaction price or supplier quote.

About this data

Reference statistics derived from USITC published data. Not a customs ruling. MFN-Free and Special-rate fields describe statutory line coverage only; final entry liability requires origin, date, eligibility, exclusions and other transaction facts. Calculated Duties are statistical estimates, not a cash-collections ledger. Confirm classification, origin, program eligibility, and final entry liability with a licensed customs broker.

Last reviewed 2026-08-31.