Brazil NCM · 8-digit code

NCM 7318.16.00 – Iron or steel threaded nuts

NCM 7318.16.00 (also written 73181600) is Brazil's code for iron or steel threaded nuts. Its first 6 digits are HS code 7318.16.

Official description of NCM 7318.16.00

PortuguêsOfficial
Porcas
EnglishUnofficial translation

Iron or steel; threaded nuts

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

How to read NCM 7318.16.00

73Chapter 18Heading 16Subheading

HS code 7318.16
Same in every country

0Item 0Subitem

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. The last two digits are 00 because Brazil does not split this HS code further. The full 8-digit code is used on import declarations (DUIMP), invoices (NF-e) and tax filings.

Full classification path

  1. Chapter 73 Iron or steel articles Obras de ferro fundido, ferro ou aço.
  2. Heading 73.18 Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel Parafusos, pinos ou pernos, roscados, porcas, tira-fundos, ganchos roscados, rebites, chavetas, contrapinos ou troços, arruelas (anilhas) (incluindo as de pressão) e artigos semelhantes, de ferro fundido, ferro ou aço.
  3. Group 7318.1 Threaded articles: Artigos roscados:
  4. Subheading 7318.16 Iron or steel; threaded nuts
  5. Subitem 7318.16.00 Iron or steel; threaded nuts Porcas

Questions about NCM 7318.16.00

What is NCM 7318.16.00?

NCM 7318.16.00 (73181600) is the Brazilian (Mercosur) code for iron or steel threaded nuts. Its official Portuguese description is “Porcas”.

What is the HS code for NCM 7318.16.00?

HS 7318.16 (Iron or steel; threaded nuts). 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 7318.16.00?

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.