HTS Heading 9031

Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof

All 21 HTS codes under heading 9031 (measuring or checking instruments), with their duty rates from the 2026 HTS Revision 23. General duty Free to 1.7%.

Every line of heading 9031

  • 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.): General Free; Special none; Column 2 40%.
  • 9031.20.00.00 Test benches (under: Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof) (No.): General 1.7%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 45%.
  • 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): General Free; Special none; Column 2 50%.
  • 9031.41.00.20 For inspecting photomasks or reticles used in manufacturing semiconductor devices (No.).
  • 9031.41.00.40 For wafers (under: For inspecting semiconductor wafers or devices) (No.).
  • 9031.41.00.60 Other (under: For inspecting semiconductor wafers or devices) (No.).
  • 9031.49 Other (under: Other optical instruments and appliances).
  • 9031.49.10.00 Profile projectors (under: Other) (No.): General Free; Special none; Column 2 45%.
  • 9031.49.40.00 Coordinate-measuring machines (No.): General Free; Special none; Column 2 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.): General Free; Special none; Column 2 50%.
  • 9031.49.90.00 Other (under: Other) (No.): General Free; Special none; Column 2 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.): General Free; Special none; Column 2 40%.
  • 9031.80.80 Other (under: Other instruments, appliances and machines): General Free; Special none; Column 2 40%.
  • 9031.80.80.60 For testing electrical characteristics (kg).
  • 9031.80.80.70 Other (under: Equipment for testing the characteristics of internal combustion engines) (kg).
  • 9031.80.80.85 Other (under: Other) (kg).
  • 9031.90 Parts and accessories (under: Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof).
  • 9031.90.21.00 Of profile projectors (under: Parts and accessories) (kg): General Free; Special none; Column 2 45%.
  • 9031.90.45.00 Bases and frames for the coordinate-measuring machines of subheading 9031.49.40 (kg): General Free; Special none; Column 2 50%.
  • 9031.90.54.00 Of optical instruments and appliances of subheading 9031.41 or 9031.49.70 (kg): General Free; Special none; Column 2 50%.
  • 9031.90.59.00 Other (under: Of other optical instruments and appliances, other than test benches) (kg): General Free; Special none; Column 2 50%.
  • 9031.90.70.00 Of articles of subheading 9031.80.40 (kg): General Free; Special none; Column 2 40%.
  • 9031.90.91 Other (under: Other): General Free; Special none; Column 2 40%.
  • 9031.90.91.30 Of machines for balancing mechanical parts (kg).
  • 9031.90.91.60 Of test benches (under: Other) (kg).
  • 9031.90.91.95 Other (under: Other) (kg).

From MFG Calcs data: Measuring and inspection instruments

U.S. imports of measuring and inspection instruments (headings 9026, 9031) came to $11.20B in 2025, with $1.14B in calculated duty: an effective duty of 10.2%, every duty included.

Effective duty in Sep 2026: 9.2%, against 15.0% in Sep 2025.

Largest sources in 2025: Mexico $1.93B at 3.0% effective duty; Germany $1.73B at 9.3% effective duty; Japan $1.15B at 8.3% effective duty; Canada $816M at 5.4% effective duty; China $760M at 44.0% effective duty.

These are family totals from U.S. import statistics published through USITC DataWeb, not this heading's rate alone; effective duty is calculated duty as a share of customs value, an estimate, not a ruling.

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.

Last reviewed 2026-11-12.