# United States tariff lines under HS 9031.90

> The United States tariff splits HS 9031.90 (parts and accessories) into 8 national lines: 9031.90.21.00 (of profile projectors), 9031.90.45.00 (bases and frames for the coordinate-measuring machines of subheading 9031.49.40), 9031.90.54.00 (of optical instruments and appliances of subheading 9031.41 or 9031.49.70), 9031.90.59.00 (other) and 4 others. Every United States line under 9031.90 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/903190
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 90](https://border.bot/countries/united-states/hs-codes/90) / [9031.90](https://border.bot/countries/united-states/hs-codes/903190)

## Key facts

- HS subheading: [9031.90](https://border.bot/hs-codes/903190)
- Duty (MFN): Free
- National lines: 8
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 90: Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof

## United States lines under 9031.90

The United States tariff splits HS 9031.90 (parts and accessories) into 8 national lines: 9031.90.21.00 (of profile projectors), 9031.90.45.00 (bases and frames for the coordinate-measuring machines of subheading 9031.49.40), 9031.90.54.00 (of optical instruments and appliances of subheading 9031.41 or 9031.49.70), 9031.90.59.00 (other) and 4 others.

Every United States line under 9031.90 is free of general (MFN) duty.

- [9031.90.21.00](https://border.bot/countries/united-states/hs-codes/9031902100) Parts and accessories, Of profile projectors. Duty (MFN): free
- [9031.90.45.00](https://border.bot/countries/united-states/hs-codes/9031904500) Parts and accessories, Of other optical instruments and appliances, other than test benches, Bases and frames for the coordinate-measuring machines of subheading 9031.49.40. Duty (MFN): free
- [9031.90.54.00](https://border.bot/countries/united-states/hs-codes/9031905400) Parts and accessories, Of other optical instruments and appliances, other than test benches, Of optical instruments and appliances of subheading 9031.41 or 9031.49.70. Duty (MFN): free
- [9031.90.59.00](https://border.bot/countries/united-states/hs-codes/9031905900) Parts and accessories, Of other optical instruments and appliances, other than test benches, Other. Duty (MFN): free
- [9031.90.70.00](https://border.bot/countries/united-states/hs-codes/9031907000) Parts and accessories, Other, Of articles of subheading 9031.80.40. Duty (MFN): free
- [9031.90.91.30](https://border.bot/countries/united-states/hs-codes/9031909130) Parts and accessories, Other, Other, Of machines for balancing mechanical parts. Duty (MFN): free
- [9031.90.91.60](https://border.bot/countries/united-states/hs-codes/9031909160) Parts and accessories, Other, Other, Of test benches. Duty (MFN): free
- [9031.90.91.95](https://border.bot/countries/united-states/hs-codes/9031909195) Parts and accessories, Other, Other, Other. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 9031.90 yet.

- [The Harmonized System text for 9031.90](https://border.bot/hs-codes/903190)

- Previous subheading: [9031.80](https://border.bot/countries/united-states/hs-codes/903180) Other instruments, appliances and machines
- Next subheading: [9032.10](https://border.bot/countries/united-states/hs-codes/903210) Automatic regulating or controlling instruments and apparatus; parts and accessories thereof

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 9031.90?

The United States tariff splits HS 9031.90 (parts and accessories) into 8 national lines: 9031.90.21.00 (of profile projectors), 9031.90.45.00 (bases and frames for the coordinate-measuring machines of subheading 9031.49.40), 9031.90.54.00 (of optical instruments and appliances of subheading 9031.41 or 9031.49.70), 9031.90.59.00 (other) and 4 others.

### What is the duty on HS 9031.90 in the United States?

Every United States line under 9031.90 is free of general (MFN) duty.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/903190.json