Analysis
Subheading 8458.91 covers numerically controlled, within heading 8458. 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 2 US tariff lines below it are national.
None of its 2 lines is duty-free at the general rate. Rates run from 4.2% to 4.4% with a median of 4.300000000000001%, so the line you choose sets the duty.
The US splits it as follows: 8458.91.10 for vertical turret lathes (4.2%) and 8458.91.50 for numerically controlled: other (4.4%).
By Census's concordance, most of its statistical lines are made by Machine Tool Manufacturing (333517). Those are the NAICS industries a US producer of these goods would report under.
Goods only reach 8458.91 once they fall within heading 8458 (lathes (including turning centers) for removing metal). Under General Rule 6, subheadings are then compared only with others at the same level, so a product is matched against its siblings, not against lines elsewhere in the chapter.
Tariff lines
| Line | Description | General rate |
|---|---|---|
| 8458.91.10 | Vertical turret lathes | 4.2% |
| 8458.91.50 | Numerically controlled: other | 4.4% |