9031.90

Analysis

Subheading 9031.90 covers parts and accessories, within heading 9031. The first six digits are shared by every country that uses the Harmonized System, so this part of the code is the same in the US, UK and EU schedules; the 6 US tariff lines below it are national.

Every one of its 6 tariff lines is duty-free at the general rate, so classification within the subheading affects statistics and Chapter 99 measures rather than the base duty.

The US splits it as follows: 9031.90.21 for of profile projectors (duty-free), 9031.90.45 for bases and frames for the coordinate-measuring machines of subheading… (duty-free), 9031.90.54 for of optical instruments and appliances of subheading 9031.41 or… (duty-free), 9031.90.59 for of other optical instruments and appliances, other than test benches… (duty-free), 9031.90.70 for of articles of subheading 9031.80.40 (duty-free) and 9031.90.91 for other: other (duty-free).

By Census's concordance, most of its statistical lines are made by Commercial and Service Industry Machinery Manufacturing (33331), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515) and Analytical Laboratory Instrument Manufacturing (334516). Those are the NAICS industries a US producer of these goods would report under.