HS Code 840991

HS code 840991 is the World Customs Organization 6-digit HS 2022 subheading for "Parts suitable for use solely or principally with the engines of heading 8407 or 8408 : Other : Suitable for use solely or principally with sparkignition internal combustion piston engines". The first two digits (84) are the chapter — Nuclear reactors, boilers, machinery and mechanical appliances; parts — and digits 3-4 (8409) are the heading. Countries add further digits (8-10) for their national tariff line.

Common products classified under 840991 include spark ignition engine parts, gasoline engine components, piston engine parts, car engine parts, auto engine spares and similar items matching suitable for use solely or principally with…. The correct code still depends on the product's material, function and intended use.

Duty is set by the destination country, not by the 6-digit HS code alone. Start from the official tariff of your market — USITC HTS (US), TARIC / Access2Markets (EU), GOV.UK Trade Tariff (UK), CBSA (Canada), ABF (Australia) or Singapore Customs — and look up the full national code with China as the country of origin.

The first 6 digits (840991) are the same worldwide under the WCO Harmonized System. Beyond that, each country extends the code (HTS in the US, TARIC in the EU, etc.) and sets its own duty and tax rates.

Treat a supplier-provided code as a clue, not a final classification. It can be incomplete, China-export-specific, or mismatched to your destination's rules. Verify against the official tariff and your product's actual material and use.