Mud Pump Piston Assembly from Japan
Replacement piston assembly designed specifically for mud pumps used in oil and gas drilling rigs under heading 8428. It handles high-pressure abrasive drilling fluids to circulate mud during borehole excavation. Classified under 8431.39.0050 as a part solely for oil and gas field machinery of 8428.
Duty Rate — Japan → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Verify compatibility with specific mud pump models from heading 8428; provide drilling rig end-use certification to avoid reclassification
• Common pitfall: missing API standards documentation leading to delays