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HTS lookup › Chapter 85 › Heading 8540

HTS 8540.99 (8540.99.00) duty rate

8540.99.00 is not a rated tariff line. Subheading 8540.99 (Thermionic, cold cathode or photocathode tubes (for example, vacuum or vapor or gas filled tubes, mercury arc rectifying tubes, cathode-ray tubes, television camera tubes); parts thereof › Parts › Other) is split into 2 tariff lines, and the duty rate depends on which one your product falls under:

LineDescriptionGeneralSection 301 (China)Exclusions
8540.99.40Electron guns; radio frequency (RF) interaction structures for microwave tubes of subheadings …FreeList 3 +25%
8540.99.80Other: OtherFreeList 3 +25%

Open the line that matches your product for its full rate table, Section 301 actions, exclusions, statistical suffixes and a free duty calculator.

Official USITC HTS, 2026HTSRev20 · check on hts.usitc.gov

Subheading 8540.99 at a glance

Heading 8540 · Chapter 85 · HTS lookup

General information from the official US Harmonized Tariff Schedule (USITC); not legal or customs advice. Classification is decided by CBP.