Chapter 84, Machinery and mechanical appliances / Heading 8431
HTS 8431.43.40.00: Offshore drilling machinery parts
Schedule text: Of offshore oil and natural gas drilling and production platforms. Classification: Parts suitable for use solely or principally with the machinery of headings 8425 to 8430 › Of machinery of heading 8426, 8429 or 8430 › Parts for boring or sinking machinery of subheading 8430.41 or 8430.49 › Of offshore oil and natural gas drilling and production platforms
General rate of duty
Free
Column 1, USITC schedule
From China, all in
50%
Priced live by the Gateway engine
Section 301 China
25%
List 1
Forced labor 301
exempt
9903.05.90
How the rate is built
Each line is a separate legal authority. They stack on the $10,000 customs value unless a carve-out says otherwise.
| Program | Rate | Amount |
|---|---|---|
General rate of duty (Column 1) Official rate: Free 8431.43.40.00 | 0% | $0.00 |
Section 301 China (List 1) | 25% | $2,500.00 |
Section 232 Steel (Derivative) As of April 6, 2026, CBP may assess Section 232 metals duties based on US sales price rather than declared customs value. | 25% | $2,500.00 |
Effective duty rate | 50% | $5,000.00 |
Checked and not applied
- Section 301 forced labor: Exempt: article is already subject to Section 232 duties (9903.05.90, U.S. note 52)
Stack priced from China on a $10,000 customs value, ocean entry. Other origins carry different programs; the calculator prices any of them.
Questions about this example
- What is HTS code 8431.43.40.00?
- HTS 8431.43.40.00 covers offshore drilling machinery parts; the schedule's own line text is "Of offshore oil and natural gas drilling and production platforms". Its full classification path in the Harmonized Tariff Schedule of the United States is: Parts suitable for use solely or principally with the machinery of headings 8425 to 8430 › Of machinery of heading 8426, 8429 or 8430 › Parts for boring or sinking machinery of subheading 8430.41 or 8430.49 › Of offshore oil and natural gas drilling and production platforms. It sits in chapter 84 (Machinery and mechanical appliances) under heading 8431.
- What is the general duty rate for HTS 8431.43.40.00?
- The Column 1 general rate of duty is Free. That is the most-favored-nation rate before any Section 301, Section 232, Section 338, Section 201 or antidumping and countervailing action, and before CBP's Merchandise Processing and Harbor Maintenance fees.
- What is the tariff on HTS 8431.43.40.00 from China?
- Priced on $10,000 of goods, the effective duty from China is 50%: 0% general rate + 25% Section 301 + 25% Section 232 Steel (Derivative). Section 301 applies (List 1). Forced-labor duty: Exempt: article is already subject to Section 232 duties (9903.05.90, U.S. note 52).
- Which lines are related to HTS 8431.43.40.00?
- Neighbouring statistical lines under the same 8-digit heading are listed on this page. All lines under one 8-digit heading share the same legal duty rate; the tenth digit reports statistics.