Section XVIII · Optical, photographic, measuring, medical or surgical instruments
9031.90
Parts and accessories:
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Chapter
Optical, photographic, measuring, medical or surgical instruments
Heading
The product family within the chapter
Subheading
The specific good, identical worldwide
The first six digits are the same in every country that uses the Harmonized System. The United States adds two more for the tariff rate and, often, two more for statistics — which is why the rates below are listed against 8- and 10-digit numbers rather than against this code.
How the schedule reaches this code
- 90Optical, photographic, measuring, medical or surgical instruments
- 9031Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof:
- Parts and accessories:
Published US duty rates
Duty is set at the 8- or 10-digit line, not at this 6-digit subheading, so more than one rate can sit under this code.
- 9031.90.21.00Of profile projectorskg
- General
- Free
- Special (FTA)
- —
- Column 2
- 45%
No preferential rate published.
Countries without normal trade relations.
- 9031.90.45.00Bases and frames for the coordinate-measuring machines of subheading 9031.49.40kg
- General
- Free
- Special (FTA)
- —
- Column 2
- 50%
No preferential rate published.
Countries without normal trade relations.
- 9031.90.54.00Of optical instruments and appliances of subheading 9031.41 or 9031.49.70kg
- General
- Free
- Special (FTA)
- —
- Column 2
- 50%
No preferential rate published.
Countries without normal trade relations.
- 9031.90.59.00Otherkg
- General
- Free
- Special (FTA)
- —
- Column 2
- 50%
No preferential rate published.
Countries without normal trade relations.
- 9031.90.70.00Of articles of subheading 9031.80.40kg
- General
- Free
- Special (FTA)
- —
- Column 2
- 40%
No preferential rate published.
Countries without normal trade relations.
- 9031.90.91Other
- General
- Free
- Special (FTA)
- —
- Column 2
- 40%
No preferential rate published.
Countries without normal trade relations.
Schedule footnotes
- See U.S. note 19 to subchapter III, chapter 99.
A reference to Chapter 99 means an additional action — a Section 232 or 301 measure, an exclusion, or a quota — applies on top of the rate above.
This is the listed rate. Antidumping and countervailing duty orders, Chapter 99 actions and preference qualification all change what is actually collected, and classification is a judgement about your goods. Verify with your licensed customs broker before you file.
Estimate the duty for this code
Choose where the goods come from and enter their customs value in US dollars. Free, with no signup — an estimate from the published rates, to confirm with your licensed customs broker.
Other subheadings in heading 9031
- 9031.10Machines for balancing mechanical parts
- 9031.20Test benches
- 9031.41For inspecting semiconductor wafers or devices (including integrated circuits) or for inspecting photomasks or reticles used in manufacturing semiconductor devices (including integrated circuits)
- 9031.49Other:
- 9031.80Other instruments, appliances and machines:
Source: U.S. International Trade Commission (USITC) — 2026 HTS Revision 20, released 2026-09-28, published at hts.usitc.gov. A U.S. Government work in the public domain.