HS 902590 Parts and accessories
Quick Answer: Parts and accessories for instruments and apparatus of heading 9025 enter the UK and EU duty-free, while in the US, the duty rate is the same as that applicable to the article of which they are a part or accessory. HS code 902590 specifically covers components and supplementary items for instruments and appliances used for measuring, checking, or automatically controlling industrial processes, or for meteorological, hydrological, or geophysical purposes, such as parts for thermometers, barometers, hydrometers, and density meters. Importers should verify the classification of the complete instrument to determine the correct US duty rate for these parts. According to CustomTariffs data, this code generally facilitates duty-free entry in major markets.
What Are the Import Duty Rates?
🇬🇧 United Kingdom
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 9025900000 | — | — | — |
| 9025900010 | 0.00 % | — | — |
| 9025900090 | 0.00 % | — | — |
🇪🇺 European Union (TARIC)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 9025900000 | — | — | — |
| 9025900010 | — | — | — |
| 9025900090 | 0.00 % | — | — |
🇺🇸 United States (HTSUS)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 9025900600 | Free | — | ["kg"] |
Duty rates sourced from the USITC (US International Trade Commission) Harmonized Tariff Schedule (HTS) (accessed 2/22/2026), EU TARIC – DG TAXUD (Directorate-General for Taxation and Customs Union) (accessed 2/22/2026), and UK Trade Tariff – HMRC (His Majesty's Revenue and Customs) (accessed 2/22/2026).
Data compiled and presented by HSRates.
How Has Trade Volume Developed?
Trade Volume 2023
How to Classify This HS Code?
What products does HS 902590 cover?
This subheading covers parts and accessories specifically designed for instruments and appliances of heading 9025, which includes hydrometers, saccharometers, thermometers, barometers, and psychrometers, whether or not combined with each other. According to the WCO Harmonized System Explanatory Notes and definitions found in official tariff schedules like the USITC Harmonized Tariff Schedule (HTS) and the EU's TARIC, this includes components such as glass tubes for thermometers, floats for hydrometers, calibration weights, protective cases, and mounting hardware, provided they are solely or principally used with these instruments.
What falls outside HS 902590?
The following products are excluded from HS 902590: complete instruments of heading 9025, general-purpose tools or parts that can be used with a variety of instruments (e.g., standard screws or generic plastic casings not specifically shaped for a 9025 instrument), and parts for instruments classified in other headings of Chapter 90, such as optical instruments (9001-9023) or measuring instruments for electrical quantities (9030). For instance, a standalone digital display unit not integrated into a 9025 instrument would likely be classified elsewhere.
What are common classification mistakes for HS 902590?
A common error is classifying a part or accessory under HS 902590 when it is an integral component of a more complex instrument that is classified as a whole under a different heading, or when the part is not exclusively or principally designed for instruments of heading 9025. For example, a general-purpose battery pack, even if used with a digital thermometer, would not fall under 902590 if it has broader applications, potentially being classified under HS 8507. Adherence to General Rule of Interpretation (GRI) 1 and GRI 3 is crucial.
How should importers classify products under HS 902590?
The correct procedure for classifying products under HS 902590 involves a detailed examination of the item's function and intended use, referencing the specific descriptions within heading 9025 and its subheadings. Importers and customs brokers must consult the official tariff schedule of the importing country (e.g., USITC HTS, EU TARIC, UK Trade Tariff) and the WCO HS Explanatory Notes. They should determine if the part or accessory is specifically designed for and exclusively or principally used with instruments of heading 9025, ensuring it meets the criteria for this subheading.
How is the duty calculated for products under HS 902590?
A set of 10 replacement glass tubes for a mercury thermometer, declared at a customs value of $50 USD, would attract a US duty of $1.50. This is calculated using the Most Favored Nation (MFN) duty rate of 3.0% ad valorem, applied to the declared value: 3.0% × $50 = $1.50. This calculation is based on the rates published in the USITC Harmonized Tariff Schedule (HTS) for HS code 902590.90.
Which trade agreements reduce duties for HS 902590?
Several free trade agreements may reduce the applicable duty rate for HS 902590, including the United States-Mexico-Canada Agreement (USMCA), which can result in Free duty for qualifying goods originating from Canada or Mexico. Additionally, the Generalized System of Preferences (GSP) may offer duty-free entry for eligible goods from designated developing countries. To claim preferential treatment under USMCA, a self-certified origin statement is typically required. For GSP, a GSP Form A is generally necessary, depending on the importing country's specific requirements.
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FAQ
What are the typical import duty rates for HS code 902590 (Parts and accessories for instruments and appliances for measuring, checking, or automatically controlling process of liquids or gases)?
The import duty rates for HS code 902590 are generally low or free. For example, under the US Harmonized Tariff Schedule (HTS), the Most Favored Nation (MFN) duty rate is 0.00%. Similarly, the UK Global Tariff shows a 0.00% duty rate for this classification. It is crucial to consult the specific tariff schedule of the importing country for the most accurate and up-to-date rates, as preferential rates under Free Trade Agreements (FTAs) may further reduce or eliminate duties.
How is the classification of 'parts and accessories' under HS 902590 determined?
Classification under HS 902590 hinges on whether an article is specifically designed as a part or accessory for instruments and appliances covered by heading 9025 (e.g., hydrometers, thermometers, barometers, flow meters, level gauges). According to the General Rules for the Interpretation of the Harmonized System (GRI), particularly GRI 1 and GRI 2(a), parts and accessories are generally classified with the principal goods they are intended to serve. Customs authorities will assess if the item is dedicated to the functioning of the main instrument and not suitable for general use. For instance, a specialized sensor probe for a gas flow meter would likely fall under 902590, whereas a standard screwdriver would not.
What documentation is typically required when importing parts and accessories under HS code 902590?
When importing parts and accessories classified under HS 902590, standard import documentation is usually required. This includes a commercial invoice detailing the value and description of the goods, a packing list, and a bill of lading or air waybill. Depending on the importing country and the specific nature of the parts, a certificate of origin may be necessary to claim preferential duty rates under trade agreements. Importers should also be prepared to provide technical specifications or product literature that substantiates the classification and intended use of the parts and accessories.
How do trade agreements, such as USMCA or EU FTAs, impact the duty rates for HS code 902590?
Trade agreements can significantly impact duty rates for HS code 902590. For instance, under the United States-Mexico-Canada Agreement (USMCA), eligible parts and accessories originating from Canada or Mexico may qualify for duty-free entry into the United States. Similarly, Free Trade Agreements between the European Union and partner countries often provide for reduced or eliminated duties on goods, including parts and accessories, provided they meet the rules of origin stipulated in the respective agreements. Importers must obtain a valid certificate of origin and ensure compliance with all FTA requirements to benefit from these preferential rates.
Can you provide a numerical example of how import duty is calculated for HS code 902590?
Let's assume a shipment of specialized pressure sensor diaphragms, classified under HS 902590, is imported into the United States. The MFN duty rate is 0.00%. If the declared value of the diaphragms is $5,000 USD, and the duty rate is 0.00% ad valorem, the calculation would be: Duty = Value × Duty Rate = $5,000 USD × 0.00% = $0.00 USD. In this scenario, no import duty is payable. If, hypothetically, a specific country had a 2.5% ad valorem duty rate for this code, the duty would be $5,000 USD × 2.5% = $125 USD. Always verify the applicable duty rate for the specific importing country and any potential preferential treatments.