Nonmalleable Cast Iron Reducing Coupling from Mexico
A threaded reducing coupling of nonmalleable cast iron that joins pipes of different diameters in drainage systems. Classified under HTS 7307.11.00 for its cast construction from nonmalleable iron, providing corrosion resistance in underground applications.
Duty Rate — Mexico → United States
14.8%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide mill test certificates specifying nonmalleable cast iron chemistry to comply with HTS material requirements
• Ensure thread standards (e.g
• NPT) match US plumbing norms to avoid import delays from non-compliance
• Watch for overclassification as malleable iron; request foundry process details if chemical analysis shows higher ductility