Heading 8401

HTS code 8401 — Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof

Chapter
84 — Machinery and mechanical appliances
Tariff lines
4
General duty
General duty rates from 2.6% to 3.3%

Tariff lines under heading 8401

Full 10-digit codes with their general (MFN) duty rates. The correct line depends on the product's material, construction, and use.

HTS codeDescriptionGeneral rateUnit
8401.10.0000Nuclear reactors (Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof)3.3%t
8401.20.0000Machinery and apparatus for isotopic separation, and parts thereof (Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof)2.6%t
8401.30.0000Fuel elements (cartridges), non-irradiated, and parts thereof (Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof)3.3%kg
8401.40.0000Parts of nuclear reactors (Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof)3.3%t

Documents required to import under 8401

Customs paperwork typically required to import these goods into the United States. Conditional items depend on shipment value, transport mode, or origin.

  • Commercial InvoiceRequired
  • Packing ListRequired
  • Bill of Lading / Airway BillRequired
  • CBP Entry Summary (7501)Required

    Prepared and filed by your customs broker

  • CBP Entry / Release (3461)Required

    Prepared and filed by your customs broker

  • Customs Bond (CBP 301)Conditional

    Required for formal entries — generally shipments valued over $2,500

    Single-entry or continuous bond, obtained through your broker or a surety

  • Importer Security Filing (ISF "10+2")Conditional

    Required for ocean freight only

    Filed electronically at least 24 hours before loading at the foreign port

  • Importer ID Input Record (CBP 5106)Conditional

    Required to establish or update your importer-of-record number with CBP

    One-time setup for a new importer; not filed per shipment

  • Entry Manifest (CBP 7533)Conditional

    Alternative to the 3461 for informal, low-value, or contiguous-country entries

  • FCC Declaration (Form 740)Conditional

    Required for electronic devices that emit radio frequency

  • FDA Radiation Declaration (Form 2877)Conditional

    Required for products that emit radiation (X-ray, laser, microwave, etc.)

Common questions

What is HTS code 8401?
HTS heading 8401 covers nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof. It sits in Chapter 84 (machinery and mechanical appliances) of the US Harmonized Tariff Schedule and contains 4 tariff lines.
What is the duty rate for HTS 8401?
General duty rates from 2.6% to 3.3%. The general rate applies to most-favoured-nation trading partners; goods from countries with a free trade agreement may qualify for a reduced or duty-free special rate.
How many digits does a full HTS code have?
US import entries require the full 10-digit HTS code. Heading 8401 is the first four digits — the remaining six narrow it down to the specific product, which is what determines the duty rate you actually pay.

Related headings in Chapter 84