Indian ITC-HS · Subheading (6-digit)
HSN / HS Code 840999Other : piston assemblies
Why might this GST rate differ?
This is the base GST / IGST rate for the heading. The actual rate can vary with the product’s composition, form, packaging or end use — some sub-items attract a different rate under the schedules and exemptions of Notification 09/2025-Integrated Tax (Rate). Always verify the exact item before filing.
HSN code 840999 covers Other : piston assemblies. GST / IGST is 18%.
Heading 8409: PARTS SUITABLE FOR USE SOLELY OR PRINCIPALLY WITH THE ENGINES OF HEADING 8407 OR 8408
Ask AI about this code
Answers are grounded in the official tariff data shown on this page.
AI-generated from official tariff data on this page, and may use web search for added context. Indicative only — verify duties and compliance against the latest CBIC/DGFT notifications before importing.
Where this code sits
- 18409Heading (4-digit)PARTS SUITABLE FOR USE SOLELY OR PRINCIPALLY WITH THE ENGINES OF HEADING 8407 OR 8408
- 2840999Subheading (6-digit)Other : piston assemblies :
Tariff items under HSN 840999
The 8-digit tariff items within subheading 840999, each with its own GST rate and effective import-duty breakdown.
- 84099911Valve, inlet and exhaust
- 84099912Pistons
- 84099913Piston rings
- 84099914Piston assemblies
- 84099920Fuel nozzles
- 84099930Fuel injection equipment excluding injection pumps
- 84099941Of diesel engines for motor vehicles
- 84099942Of outboard engine
- 84099949Other
- 84099990Other
What is an HSN Code?
An HSN code (Harmonized System of Nomenclature) is an internationally standardised numeric system to classify traded products. Indian customs extend it to an 8-digit ITC-HS code for more precise classification, taxation and compliance.
- First 2 digits: Chapter (e.g. 84)
- Digits 3–4: Heading
- Digits 5–6: Subheading (WCO-aligned)
- Last 2 digits: Indian ITC extension for added granularity
Why is the right HSN code important?
- Ensures correct calculation of customs duties and taxes.
- Required for shipping bills, bills of entry, GST filings and FTA certificates of origin.
- Helps avoid clearance delays, penalties or reclassification disputes.
How to use this HSN code
Export Documentation
Use this code in your Commercial Invoice, Packing List, and Shipping Bill for exports from India.
Import Clearance
Required for the Bill of Entry and customs clearance when importing goods into India.
GST Classification
Drives the applicable GST rate, HSN-wise summary in GSTR-1 and ITC eligibility checks.
Common HSN code mistakes to avoid
- • Reusing outdated or incorrect codes from old shipments
- • Mixing up similar product codes without checking descriptions
- • Ignoring the last 2 digits which affect Indian duty rates
- • Not considering composition, end use or manufacturing process
- • Relying solely on online tools without professional verification
Need more information?
For complex products, consult with customs brokers or trade experts who can classify based on:
- • Physical product inspection
- • Material composition / manufacturing process
- • Intended end-use
- • Latest customs notifications & advance rulings
Additional Resources
• DGFT Policy: Guidelines for export-import procedures
• Customs Tariff: Complete HSN code list with duty rates
• GST Notifications: Latest tax-rate updates
• Trade Portal: Government trade documentation support
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Open toolHSN Code 840999 — FAQs
Duty, GST and classification questions answered from the official Customs Tariff data.
HSN code 840999 (Other : piston assemblies) attracts 18% IGST under Schedule II of the GST notification.
The Basic Customs Duty (BCD) for HSN code 840999 is 15%.
HSN code 840999 covers Other : piston assemblies. It sits under Chapter 84 – Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof, in Section XVI – MACHINERY AND MECHANICAL APPLIANCES; ELECTRICAL EQUIPMENT; PARTS THEREOF; SOUND RECORDERS AND REPRODUCERS, TELEVISION IMAGE AND SOUND RECORDERS AND REPRODUCERS, AND PARTS AND ACCESSORIES OF SUCH ARTICLES.
The HSN code for Other : piston assemblies is 840999, classified under Chapter 84 – Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof of India's Customs Tariff (ITC-HS).
The standard unit of quantity (UQC) for HSN code 840999 is kg, as listed in the Customs Tariff.
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