9031.90—Parts and accessories
General duty rate
Free
Across 8 10-digit lines
Coverage on this page
9031.90—Parts and accessoriesGeneral duty rate
Free
Across 8 10-digit lines
Coverage on this page
HTS 9031.90 is a 6-digit subheading of the U.S. Harmonized Tariff Schedule covering Parts and accessories. It sits in Chapter 90: Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof, Section XVIII: Optical, Photographic, Cinematographic, Measuring, Checking, Precision, Medical or Surgical Instruments and Apparatus; Clocks and Watches; Musical Instruments; Parts and Accessories Thereof and rolls up 8 10-digit statistical lines, all with a general duty rate of Free. 6 Chapter 99 tariff modifications currently touch one or more lines under this subheading, and 18 AD/CVD orders flag at least one child line.
Pick a line to view full rate detail and compute landed duty
9031.90.21.00Of profile projectorsFree9031.90.45.00Bases and frames for the coordinate-measuring machines of subheading 9031.49.40Free9031.90.54.00Of optical instruments and appliances of subheading 9031.41 or 9031.49.70Free9031.90.59.00OtherFree9031.90.70.00Of articles of subheading 9031.80.40Free9031.90.91.30Of machines for balancing mechanical partsFree9031.90.91.60Of test benchesFree9031.90.91.95OtherFreeChapter 99 overlays touching one or more lines under 9031.90
| Code | Authority | Rate |
|---|---|---|
| 9903.85.08 | section_232 | The duty provided in the applicable subheading + a duty of 50% upon the value of the aluminum content. |
| 9903.85.15 | section_232 | The duty provided in the applicable subheading + a duty of 25% upon the value of the aluminum content |
| 9903.85.09 | section_232 | The duty provided in the applicable subheading. |
| 9903.85.01 | section_232 | The duty provided in the applicable subheading + 10% |
| 9903.85.68 | section_232 | The duty provided in the applicable subheading + 200% |
| 9903.85.70 | section_232 | The duty provided in the applicable subheading + 200% |
Antidumping or countervailing orders covering one or more lines under 9031.90
A-570-158ADChinaAluminum Extrusions from China (2024 Investigation)A-533-920ADIndiaAluminum ExtrusionsA-475-846ADItalyAluminum ExtrusionsA-580-918ADKorea, Republic ofAluminum ExtrusionsA-560-840ADIndonesiaAluminum ExtrusionsA-557-826ADMalaysiaAluminum ExtrusionsA-489-850ADTürkiyeAluminum ExtrusionsA-549-847ADThailandAluminum ExtrusionsA-301-806ADColombiaAluminum ExtrusionsA-583-874ADTaiwanAluminum ExtrusionsA-331-804ADEcuadorAluminum ExtrusionsA-552-837ADVietnamAluminum ExtrusionsC-570-159CVDChinaAluminum ExtrusionsC-560-841CVDIndonesiaAluminum ExtrusionsC-489-851CVDTürkiyeAluminum ExtrusionsA-520-810ADUnited Arab EmiratesAluminum ExtrusionsC-201-861CVDMexicoAluminum ExtrusionsA-201-860ADMexicoAluminum ExtrusionsHTS 9031.90 is a 6-digit subheading of the U.S. Harmonized Tariff Schedule covering Parts and accessories. It belongs to Chapter 90 and rolls up 8 10-digit statistical lines that brokers actually file at entry.
Every 10-digit line under HTS 9031.90 carries a general (Column 1) duty rate of Free. Section 301, Section 232, and AD/CVD overlays may stack on top of this rate at the per-line level — open a specific 10-digit code to see its complete tariff stack.
U.S. Customs requires entries to be filed at the 10-digit statistical level — the broader subheading HTS 9031.90 is not directly fileable. Match your product description to the most specific 10-digit line in the list on this page; if multiple lines could apply, the General Rules of Interpretation (GRIs) and chapter notes determine which one governs.
Yes — 18 AD/CVD orders flag at least one 10-digit line under HTS 9031.90. Whether a specific shipment falls in scope depends on the country of origin and the order's scope determination. See compliance.tandom.ai for full coverage detail.
Tandom guides relevant to this code
What changed April 6, 2026, what stayed the same, and how to file a steel, aluminum, or copper line in ACE without leaving duty exposure on the table.
Open resource
How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
Open resource
A working guide to the inputs, the layers, and the math behind a US entry summary in 2026. Written for brokers, forwarders, and importer compliance teams.
Open resource
Where trade compliance APIs fit in a broker's filing pipeline: HTS classification, duty calculation, AD/CVD scope match, and post-summary corrections.
Open resource
Drop the Tandom Duty Calculator API into a TMS, broker software, or in-house ERP. Code samples, the response shape, and ACE reporting order, in 2026.
Open resource
What the 178 active Section 301 exclusions cover, how to claim 9903.88.69 on an entry, and what changes when the November 10, 2026 deadline passes.
Open resource