Mexico supplies 26.5% of U.S. imports of Railway & Tramway Coupling Devices (Buffers, and Parts), across 21 countries (year to date through August 2026).
HHI 1,975 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
21 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | Mexico | $2.0M | 29.3% | -22.9% | 22.3% |
| 2 | Poland | $1.5M | 21.8% | +22.4% | 19.6% |
| 3 | China | $1.3M | 18.5% | -21.7% | 52.9% |
| 4 | India | $932K | 13.6% | -43.6% | 26.7% |
| 5 | Germany | $510K | 7.4% | +75.4% | 28.6% |
| 6 | Canada | $376K | 5.5% | -20.3% | 11.6% |
| 7 | Sweden | $73K | 1.1% | -46.6% | 27.6% |
| 8 | Switzerland | $69K | 1.0% | +52.0% | 28.1% |
| 9 | United Kingdom | $66K | 1.0% | +64.3% | 17.6% |
| 10 | Finland | $28K | 0.4% | -- | 28.0% |
| 11 | Spain | $17K | 0.3% | +58.7% | 28.6% |
| 12 | Turkey | $7K | 0.1% | -23.1% | 27.6% |
| 13 | Czech Republic | $4K | 0.1% | -98.8% | 35.0% |
| 14 | Austria | $3K | 0.1% | -45.2% | 27.6% |
| 15 | Netherlands | -- | 0.0% | -- | -- |
| 16 | Denmark | -- | 0.0% | +184.4% | -- |
| 17 | Vietnam | -- | 0.0% | -98.8% | -- |
| 18 | Brazil | -- | 0.0% | -37.2% | -- |
| 19 | South Korea | -- | 0.0% | -60.3% | -- |
| 20 | Taiwan | -- | 0.0% | +88.7% | -- |
| 21 | Japan | -- | 0.0% | +42.3% | -- |
Duty is the duty Census calculated on this month's imports for consumption from each country, as a share of their customs value. It applies the rates in force, additional duties such as Section 301, 232 and IEEPA included and claimed trade-agreement preferences netted out, so it is an observed rate rather than a statutory one. It is an estimate, not duty collected: antidumping and countervailing duties, fees and later refunds are not in it. YoY compares year-to-date value with the same months last year.