piston ring
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 8409919990 | 37.5% | CN | US | Official Doc |
| 8409999990 | 35.0% | CN | US | Official Doc |
| 7326190080 | 87.9% | CN | US | Official Doc |
| 7326190010 | 87.9% | CN | US | Official Doc |
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AI Analysis
βοΈ Piston Rings (Engine Components)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Breakdown | Strategic Entry Strategy
π I. Product Definition & Classification: What Exactly Is a Piston Ring?
Piston rings are critical mechanical components used in internal combustion engines (both spark-ignition and compression-ignition/diesel). Their primary function is to seal the combustion chamber, regulate oil consumption, and transfer heat from the piston to the cylinder wall.
In international trade, piston rings are classified not by their shape, but by their specific application within the engine type. The Harmonized System (HS) distinguishes between: 1. Spark-Ignition Engines (typically gasoline/petrol): These have specific subheadings for parts. 2. Compression-Ignition Engines (typically diesel): These fall under different "Other parts" categories. 3. General Engine Parts: Parts not specifically described for either type.
β οΈ Critical Distinction Point:
- If the ring is designed specifically for spark-ignition engines β Use 8409.91.99.90.
- If the ring is designed for other engines (e.g., diesel, marine, industrial) or is a general-purpose part not specified for 8407/8408 types β Use 8409.99.99.90.
- Note: Iron/Steel articles that are merely "forged or stamped" without being specifically identifiable as engine parts may fall under 7326, but for actual engine components, Chapter 84 (Machinery) usually prevails over Chapter 73 (Iron/Steel) based on GRI 1 and 3(b). However, the provided data includes 7326 codes, implying a scenario where the items might be classified as raw forged articles or non-identifiable steel stamps. For true piston rings, 8409 is standard, but we must analyze the provided data which includes 7326 and 8409.Analysis of Provided Data:
The provided dataset contains a mix of Iron/Steel articles (7326) and Engine Parts (8409). This suggests the input might cover: 1. Raw/Unfinished Forged Parts: Classified under 7326 (Forged steel articles). 2. Finished Piston Rings: Classified under 8409 (Parts of engines).
We will explain the classification for Piston Rings based on the available HS codes in the <DATA>, focusing on the 8409 codes for finished rings, and addressing the 7326 codes if the rings are considered unfinished forged steel articles.
π¦ II. HS Code Classification Details (2026 Latest Tariff Alignment)
| HS Code | Product Description | Application Scenario | Key Classification Criteria |
|---|---|---|---|
8409.91.99.90 |
Parts suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines): Other: Other | Gasoline Engine Piston Rings: Standard automotive, motorcycle, or small engine piston rings designed for spark-ignition systems. | β Specific to Spark-Ignition engines (Heading 8407). |
8409.99.99.90 |
Parts suitable for use solely or principally with the engines of heading 8407 or 8408: Other: Other: Other: Other Other | Diesel/Other Engine Piston Rings: Piston rings for compression-ignition (diesel) engines, marine engines, or industrial engines not covered under 8409.91. | β Specific to Other Engines (Heading 8408 or general 8407/8408 parts not specified in 8409.91). |
7326.19.00.10 |
Other articles of iron or steel: Forged or stamped, but not further worked: Other Forged | Unfinished/Forged Steel Parts: If the piston ring is in its raw forged state, not yet machined to final dimensions, or if customs deems it a generic forged steel article rather than a specific engine part. | β Not a finished engine part. Classified as generic forged steel. |
7326.19.00.80 |
Other articles of iron or steel: Forged or stamped, but not further worked: Other Other | Generic Forged Steel Articles: Broad category for forged steel items that do not fit specific "Other Forged" descriptions or are not further worked. | β Generic. High tariff burden. Avoid if possible. |
π Key Insight:
- Finished Piston Rings should ideally be classified under 8409.
- Unfinished/Forged Blanks might fall under 7326.
- Misclassification Risk: Declaring a finished piston ring as7326can lead to lower duties but may be rejected by customs as "not further worked." Conversely, declaring a raw forging as8409may be rejected as "not a usable part."
π° III. 2026 Latest Tariff Rate Breakdown (Including Additional Taxes, Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: 2025 November 10 onwards (and subsequent imports)
π― 1. 8409.91.99.90 ββ Piston Rings for Spark-Ignition Engines
| Item | Content |
|---|---|
| Base Tariff | 2.5% (ad valorem) |
| Section 301 Additional Tariff | +25.0% (Trump Administration Trade Action) |
| Total Tariff Rate | 27.5% |
| Tax Calculation | CIF Value Γ 27.5% |
| Eligibility for De Minimis | β No (deny_de_minimis) |
| Legal Basis Path | USITC:8409.91.99.90 β Section301:Footnote 9903.88.01 |
π Explanation:
- Piston rings for gasoline engines are explicitly listed under "Parts for Spark-Ignition Engines." - The 25% Section 301 tariff applies to all Chinese-origin goods under this HS code. - Total cost impact: 27.5%. This is a moderate-high tariff, but significantly lower than the 7326 category in some contexts.
π― 2. 8409.99.99.90 ββ Piston Rings for Other Engines (e.g., Diesel)
| Item | Content |
|---|---|
| Base Tariff | 0.0% (ad valorem) |
| Section 301 Additional Tariff | +25.0% (Trump Administration Trade Action) |
| Total Tariff Rate | 25.0% |
| Tax Calculation | CIF Value Γ 25.0% |
| Eligibility for De Minimis | β No (deny_de_minimis) |
| Legal Basis Path | USITC:8409.99.99.90 β Section301:Footnote 9903.88.01 |
π Note:
- For diesel or other non-spark-ignition engine parts, the base rate is 0%, but the 25% Section 301 tariff still applies. - Total cost impact: 25.0%. This is slightly more favorable than spark-ignition parts (27.5%).
π― 3. 7326.19.00.10 / 7326.19.00.80 ββ Forged Steel Articles (If Misclassified or Raw)
| Item | Content |
|---|---|
| Base Tariff | 0.0% (for 7326.19.00.10) or 2.9% (for 7326.19.00.80) |
| Section 301 Additional Tariff | +50.0% (Steel, Aluminum, Copper Products Surtax) |
| Total Tariff Rate | 50.0% (for 7326.19.00.10) or 52.9% (for 7326.19.00.80) |
| Tax Calculation | CIF Value Γ 50.0% or 52.9% |
| Eligibility for De Minimis | β No (deny_de_minimis) |
| Legal Basis Path | USITC:7326.19.00.10/80 β IEEPA:9903.01.25 (Steel/Copper Surtax) |
π Explanation:
- Crucial Alert: The provided data indicates a 50% surtax for "Steel, Aluminum, Copper Products" under Section 301/IEEPA. - If piston rings are classified as 7326 (Forged Steel), they face a 50% or 52.9% tariff, which is much higher than the 8409 classification (25-27.5%). - Strategy: Always aim for 8409 classification for piston rings, as they are specific engine parts, not generic steel articles.
π οΈ IV. Customs Clearance Practical Advice (Real-World Pitfall Avoidance)
β 1. Documentation Checklist (Non-Negotiable)
| Document | Required | Description |
|---|---|---|
| β Product Specifications | βοΈ | Must clearly state: "Piston Ring for [Engine Type: Spark/Diesel]," material, dimensions, and compliance with ISO/SAE standards. |
| β Technical Drawings | βοΈ | Show that the item is a finished, machined component, not a raw forging. |
| β Commercial Invoice | βοΈ | Clearly describe as "Piston Ring" or "Engine Part," not "Steel Forging." |
| β Origin Certificate | βοΈ | If from China, expect Section 301 tariffs. If from Vietnam/Mexico, may be eligible for exemptions. |
| β Third-Party Certificates | βοΈ | ISO 9001, material test reports (composition of steel) to prove quality and identity. |
β 2. Declaration Strategy (Key Mantra)
π₯ "Finish Matters, Engine Type is King: 8409 Saves, 7326 Burns!"
| Scenario | Correct Declaration | Wrong Action |
|---|---|---|
| Finished Piston Ring (Gasoline) | 8409.91.99.90 |
Declaring as 7326.19.00.80 β 52.9% tariff! |
| Finished Piston Ring (Diesel) | 8409.99.99.90 |
Declaring as 7326.19.00.10 β 50% tariff! |
| Raw Forged Ring Blanks | 7326.19.00.10 |
Declaring as 8409 β Rejection for being unfinished. |
| Mixed Shipment | Separate HS Codes | Mixing 8409 and 7326 in one line item β Audit risk. |
β 3. Special Circumstances Handling
| Situation | Handling Advice |
|---|---|
| OEM Custom Rings | Provide OEM agreement and technical specs proving engine-specific design. |
| Rings with Packaging | Declare rings only; packaging should not inflate CIF value unnecessarily. |
| Chinese Origin | Prepare for 25-27.5% tariff (8409) or 50%+ (7326). Budget accordingly. |
| Non-Chinese Origin | If rings are forged in China but finished in Mexico/Vietnam, check for Rules of Origin eligibility for tariff exemption. |
π V. Global Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (CN Origin) | Certification | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 8409.91.99.90 / 8409.99.99.90 |
25.0% - 27.5% | No specific US certification, but must comply with Section 301. | Avoid 7326 unless truly raw. |
| π¨π³ China | 8409.91.99.90 / 8409.99.99.90 |
5% - 10% | CCC (if part of complete engine system) | Lower import duty, no Section 301. |
| πͺπΊ EU | 8409.91.00 / 8409.99.00 |
2.5% - 4.0% | CE (if part of machinery) | No major surtaxes for auto parts. |
| π²π½ Mexico | 8409.91.01 / 8409.99.01 |
5% | NOM | Potential USMCA benefits if originating. |
| π»π³ Vietnam | 8409.91.99 / 8409.99.99 |
5% | No major surtax | Many manufacturers shift production here to avoid US tariffs. |
π Conclusion:
- USA is the highest-cost market due to Section 301 tariffs.
- EU and China offer much lower duties.
- Supply Chain Strategy: Consider sourcing from Vietnam or Mexico to avoid US tariffs, provided rules of origin are met.
π VI. Common Errors & Pitfall Guide (Blood Lessons)
β Error 1: Declaring finished piston rings as 7326.19.00.80 (Forged Steel)
π Consequence: 52.9% tariff instead of 27.5%. Overpayment of 25.4%!
β Error 2: Declaring raw forged blanks as 8409
π Consequence: Customs rejection for "not a usable part." Delay in clearance, potential return.
β Error 3: Not specifying Engine Type (Spark vs. Compression)
π Consequence: Customs may misclassify to 7326 or higher duty bracket. Always specify "For Spark-Ignition Engine" or "For Diesel Engine."
β Error 4: Using vague descriptions like "Steel Rings"
π Consequence: Audit risk. Customs will assume worst-case scenario (7326 with 50% tariff).
β Correct Approach:
"Piston Rings, Finished, for Spark-Ignition Internal Combustion Engines, Material: Cast Iron, Model XYZ, HS Code: 8409.91.99.90"
π― VII. Conclusion: Professional Declaration, Cost Saving, Efficiency!
π― Remember the Mantra:
πΉ "Finished Rings: 8409 (25-27.5%) | Raw Forgings: 7326 (50%+)"
πΉ "Specify Engine Type: Spark (8409.91) vs. Other (8409.99)"
πΉ "Avoid 7326 for Finished Parts: Save 25% in Duties!"
π Pro Tip:
If your piston rings are originally from China but finished in Vietnam or Mexico, apply for preferential treatment under USMCA or other FTAs. The duty could drop to 0%.
Always request an Advance Ruling (Binding Ruling) from CBP before shipping high-volume batches.
π£ Immediate Action:
π Consult with a licensed customs broker
π€ Provide detailed product specs (Spark vs. Diesel)
π Optimize your HS Code, minimize your tariff, maximize your profit!
β¨ Precision Classification, Profitable Imports!
πΌ Every percentage point of duty is profit lost.
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About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.