Brazil NCM · 8-digit subitem

NCM 8409.99.51 – Diesel cylinder heads, 200 mm diameter or more

NCM 8409.99.51 (also written 84099951) is Brazil's code for diesel cylinder heads, 200 mm diameter or more. Its first 6 digits are HS code 8409.99.

Official description of NCM 8409.99.51

PortuguêsOfficial
De diâmetro igual ou superior a 200 mm
EnglishUnofficial translation

Of a diameter of 200 mm or more

Nomenclatura Comum do Mercosul (Siscomex). Updated Oct 2026 · In force since Apr 2022 (Res Gecex 272/2021).

How to read NCM 8409.99.51

84Chapter 09Heading 99Subheading

HS code 8409.99
Same in every country

5Item 1Subitem

Added by Mercosur
Brazil, Argentina, Paraguay, Uruguay

The first 6 digits are the international HS code, so their meaning is the same in every country; Brazil publishes the text in Portuguese. Digits 7 and 8 are Brazil's own split of that HS code. The full 8-digit code is used on import declarations (DUIMP), invoices (NF-e) and tax filings.

Full classification path

  1. Chapter 84 Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof Reatores nucleares, caldeiras, máquinas, aparelhos e instrumentos mecânicos, e suas partes.
  2. Heading 84.09 Parts suitable for use solely or principally with the engines of heading no. 8407 or 8408 Partes reconhecíveis como exclusiva ou principalmente destinadas aos motores das posições 84.07 ou 84.08.
  3. Group 8409.9 Other: Outras:
  4. Subheading 8409.99 Engines; parts for internal combustion piston engines (excluding spark-ignition) Outras
  5. Item 8409.99.5 Cylinder heads Cabeçotes
  6. Subitem 8409.99.51 Of a diameter of 200 mm or more De diâmetro igual ou superior a 200 mm

Other NCM codes under HS 8409.99

8409.99.12 Diesel engine cylinder blocks and crankcasesBlocos de cilindros e cárteres 8409.99.14 Diesel engine intake or exhaust valvesVálvulas de admissão ou de escape 8409.99.15 Diesel engine intake or exhaust manifoldsColetores de admissão ou de escape 8409.99.17 Diesel engine valve guidesGuias de válvulas 8409.99.21 Diesel engine pistons, 200 mm diameter or moreDe diâmetro igual ou superior a 200 mm 8409.99.29 Diesel engine pistons under 200 mmOutros 8409.99.30 Diesel engine cylinder linersCamisas de cilindro 8409.99.41 Diesel connecting rods, 30 kg or moreDe peso igual ou superior a 30 kg 8409.99.49 Diesel connecting rods under 30 kgOutras 8409.99.59 Diesel cylinder heads under 200 mmOutros 8409.99.61 Diesel injector nozzles, 20 mm diameter or moreDe diâmetro igual ou superior a 20 mm 8409.99.69 Diesel injector nozzles under 20 mmOutros 8409.99.71 Diesel piston rings, 200 mm diameter or moreDe diâmetro igual ou superior a 200 mm 8409.99.79 Diesel piston rings under 200 mmOutros 8409.99.91 Diesel liners welded to heads, dia. 200 mm or moreCamisas de cilindro soldadas a cabeçotes, de diâmetro igual ou superior a 200 mm 8409.99.99 Other diesel engine partsOutras

Questions about NCM 8409.99.51

What is NCM 8409.99.51?

NCM 8409.99.51 (84099951) is the Brazilian (Mercosur) code for diesel cylinder heads, 200 mm diameter or more. Its official Portuguese description is “De diâmetro igual ou superior a 200 mm”.

What is the HS code for NCM 8409.99.51?

HS 8409.99 (Engines; parts for internal combustion piston engines (excluding spark-ignition)). The first 6 digits of an NCM code are its international HS code; the last 2 digits are Brazil's own split.

Is an NCM code the same as an HS code?

The first 6 digits are the same in every country. NCM adds an item digit (7th) and a subitem digit (8th). A code ending in 00 means Brazil does not split that HS code further.

Which countries use NCM 8409.99.51?

All Mercosur members use the same NCM codes: Argentina, Brazil, Paraguay and Uruguay.

Source: Siscomex Classif NCM table, updated Oct 2026 (Resolução Gecex nº 926/2026). The Portuguese text is the official one; the English is our translation.