Heading 9031: Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof
In chapter 90, Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof. 15 rate lines, laid out as HTS Revision 20 (2026) prints them.
| HTS number | Description | Units | General | Special | Column 2 |
|---|---|---|---|---|---|
| 9031 | Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof: | ||||
| 9031.10.00.00 | Machines for balancing mechanical parts | No. | Free | 40% | |
| 9031.20.00.00 | Test benches | No. | 1.7% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 45% |
| Other optical instruments and appliances: | |||||
| 9031.41.00 | For inspecting semiconductor wafers or devices (including integrated circuits) or for inspecting photomasks or reticles used in manufacturing semiconductor devices (including integrated circuits) | Free | 50% | ||
| 9031.41.00.20 | For inspecting photomasks or reticles used in manufacturing semiconductor devices | No. | |||
| For inspecting semiconductor wafers or devices: | |||||
| 9031.41.00.40 | For wafers | No. | |||
| 9031.41.00.60 | Other | No. | |||
| 9031.49 | Other: | ||||
| 9031.49.10.00 | Profile projectors | No. | Free | 45% | |
| 9031.49.40.00 | Coordinate-measuring machines | No. | Free | 50% | |
| 9031.49.70.00 | For inspecting masks (other than photomasks) used in manufacturing semiconductor devices; for measuring surface particulate contamination on semiconductor devices | No. | Free | 50% | |
| 9031.49.90.00 | Other | No. | Free | 50% | |
| 9031.80 | Other instruments, appliances and machines: | ||||
| 9031.80.40.00 | Electron beam microscopes fitted with equipment specifically designed for the handling and transport of semiconductor wafers or reticles | No. | Free | 40% | |
| 9031.80.80 | Other | Free | 40% | ||
| Equipment for testing the characteristics of internal combustion engines: | |||||
| 9031.80.80.60 | For testing electrical characteristics | kg | |||
| 9031.80.80.70 | Other | kg | |||
| 9031.80.80.85 | Other | kg | |||
| 9031.90 | Parts and accessories: | ||||
| 9031.90.21.00 | Of profile projectors | kg | Free | 45% | |
| Of other optical instruments and appliances, other than test benches: | |||||
| 9031.90.45.00 | Bases and frames for the coordinate-measuring machines of subheading 9031.49.40 | kg | Free | 50% | |
| 9031.90.54.00 | Of optical instruments and appliances of subheading 9031.41 or 9031.49.70 | kg | Free | 50% | |
| 9031.90.59.00 | Other | kg | Free | 50% | |
| Other: | |||||
| 9031.90.70.00 | Of articles of subheading 9031.80.40 | kg | Free | 40% | |
| 9031.90.91 | Other | Free | 40% | ||
| 9031.90.91.30 | Of machines for balancing mechanical parts | kg | |||
| 9031.90.91.60 | Of test benches | kg | |||
| 9031.90.91.95 | Other | kg |
Rates are quoted as printed. Each 8-digit number opens its own page with footnotes and cited chapter 99 headings.
Watch lines in heading 9031
Pick the 8 or 10 digit numbers you import and we email you the old and new text whenever a new HTS revision changes them.
See the alert plansNo line in this heading cites a chapter 99 heading in its footnotes or rate columns.
What this page leaves to your broker
This page quotes the schedule. It does not add the rates together, and it does not say whether a chapter 99 heading applies to a shipment: that turns on the country of origin, the dates and the U.S. notes to chapter 99. Section 301, Section 232 and other chapter 99 measures list the goods they cover in those notes and in Federal Register notices, so a line can be covered by a heading its footnotes never cite. A licensed customs broker makes the determination.
Built September 29, 2026 from HTS Revision 20 (2026) (USITC release 2026HTSRev20, published September 23, 2026, current since September 28, 2026). The schedule changes often; USITC's own site always has the current text.