4-1/2 Inch N-80 Casing with BTC Threads from Japan
Seamless N-80 nonalloy steel casing pipe, 4-1/2 inch OD, 9.5 mm wall thickness, featuring buttress thread couplings (BTC) for oil well applications. Classified under HTS 7304.29.10.10 as threaded/coupled seamless casing of iron/nonalloy steel with OD <215.9 mm and wall <12.7 mm for drilling.
Duty Rate — Japan → United States
50%
Rate breakdown
9903.82.0250%Except as provided for in headings 9903.82.14, 9903.85.67 and 9903.85.68, articles of aluminum, of steel or of copper and derivative aluminum or steel articles, as provided for in subdivisions (c)(i)–(v) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Ensure threading type (e.g
• BTC, LTC) is documented; mismatches can lead to reclassification
• Provide pressure test reports and chemical composition analysis for customs verification
• Label packages clearly with HTS code, dimensions, and 'OIL WELL CASING' to prevent inspection delays