K-55 BTC Casing 16 inch 72 lb/ft from China
K-55 grade seamless nonalloy steel casing with 406.4 mm (16 inch) OD, featuring BTC (Buttress Threaded and Coupled) connections for oil well intermediate casing strings. Used to stabilize wellbore during drilling. Matches 7304.29.50.60 for diameter, seamless iron/nonalloy steel in oil/gas tubing.
Duty Rate — China → United States
35%
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
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Import Tips
• Certify thread type (BTC) and connection integrity via torque-turn test data for customs verification
• Use NAIC codes specific to oilfield equipment for accurate statistical reporting