Mexico Rail Couplers Get Final Antidumping Duties
Published Date: 6/4/2026
Notice
Summary
The U.S. Department of Commerce found that certain freight rail couplers from Mexico were sold in the U.S. at unfairly low prices between May 2023 and October 2024. Because of this, they’re finalizing extra duties (taxes) to level the playing field for American businesses. These changes take effect starting June 4, 2026, impacting importers and manufacturers involved with these rail parts.
Analyzed Economic Effects
4 provisions identified: 0 benefits, 4 costs, 0 mixed.
Cash Deposit Rates Take Effect June 4, 2026
For shipments entered or withdrawn for consumption on or after June 4, 2026, cash deposit requirements apply: Amsted's cash deposit rate will equal the 6.50% company-specific margin; exporters/producers covered in prior segments keep their published rates; and the cash deposit rate for all other producers or exporters remains 48.10%. These deposit rules remain in effect until further notice.
Final Dumping Margin Set at 6.50%
Commerce found that Amsted Rail Company, Inc. and ASF-K de Mexico had a weighted-average dumping margin of 6.50% for sales to the U.S. during May 3, 2023 through October 31, 2024. This final margin is reflected in the review published June 4, 2026.
Duties Assessed Ad Valorem; Timing Rules
Commerce will instruct U.S. Customs and Border Protection to assess antidumping duties on an ad valorem basis (not per-unit). Assessment instructions will be issued no earlier than 41 days after publication (June 4, 2026), and CBP may delay liquidation for relevant entries if a timely summons is filed (within 90 days of publication).
Importer Certification and Double-Duty Risk
Importers must file a certificate about reimbursement of antidumping duties before liquidation of relevant entries under 19 CFR 351.402(f)(2). If an importer fails to file this certificate, Commerce may presume reimbursement occurred and assess double antidumping duties.
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