4 inch C90 Casing with Premium Threads from Germany
C90 grade seamless alloy steel casing, 4 inch OD, wall thickness <12.7 mm, with premium BIG ALPHA VAM threaded and coupled connections for high torque applications. Used in extended reach drilling. Classified 7304.29.31.10 for oil/gas drilling casing specifications.
Duty Rate — Germany → 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
• Premium connection running procedures must be documented
• C90 collapse ratings require validation through FEA analysis records
• Distinguish from standard API connections for proper valuation