HS code · 6-digit subheading

HS Code 8466.10 – Parts & accessories suited for use solely/principally with machines of headings 8456-8465; tool holders and self-opening dieheads

HS code 8466.10 is the 6-digit subheading for parts & accessories suited for use solely/principally with machines of headings 8456-8465, tool holders and self-opening dieheads. It is used for CNC tool holders, lathe chucks, milling machine arbors, self-opening die heads and quick-change tool posts.

What HS 8466.10 covers

This HS code encompasses essential parts and accessories specifically designed for machine tools falling under headings 8456-8465, with a particular focus on tool holders and self-opening dieheads. These components are critical for the precision, efficiency, and versatility of modern manufacturing machinery, including CNC lathes, milling machines, and grinding equipment. Tool holders secure cutting tools, ensuring stability and accuracy during machining, while self-opening dieheads are used for efficient external threading operations. Major importers and exporters in this segment are countries with advanced manufacturing sectors, such as Germany, Japan, China, and the USA, where high-tech industries like automotive, aerospace, and mold making demand sophisticated tooling solutions. Key trade considerations include material quality, precision engineering, compatibility with various machine systems, and the integration of quick-change mechanisms to minimize downtime and maximize productivity in industrial settings.

Covers
  • CNC tool holders
  • Lathe chucks
  • Milling machine arbors
  • Self-opening die heads
  • Quick-change tool posts
  • Collet chucks
  • Boring bar holders
  • Tap holders
Examples
  • Sandvik Coromant CoroTurn
  • Kennametal KM4X
  • Schunk TENDO
  • Dorian Tool Quick Change Tool Post
  • Horn Tool Holders

Codes often confused with 8466.10

Common mistake. This code can be confused with 846693 (other parts for 8456-8465) if the item is not clearly a tool holder or diehead, or with cutting tools themselves (8207) if the distinction between tool and holder is blurred.

8466.93Parts & accessories suited for use solely/principally with machines of headings 8456-8465; n.e.c. in heading no. 846684.56Machine-tools; for working any material by removal of material, by laser or other light or photon beam, ultrasonic, electro-discharge, electro-chemical, electron beam, ionic-beam, or plasma arc processes; water-jet cutting machines84.65Machine-tools; (including machines for nailing, stapling, glueing or otherwise assembling) for working wood, cork, bone, hard plastics or rubber or similar hard materials82.07Tools, interchangeable; for hand tools, whether or not power-operated, or for machine tools (pressing, stamping, punching, drilling etc), including dies for drawing or extruding metal, and rock drilling or earth boring tools

Top exporters and importers of HS code 846610, 2025

In 2025, the largest exporter of HS code 846610 in UN Comtrade data was Germany, with 25% of world exports; the largest importer in UN Comtrade data was the United States, with 30% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Top exporters 2025 · share of world exports

  1. 1 Germany $866M
  2. 2 Taiwan* ~$419M
  3. 3 United States $250M

World total: $3.5B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $1.0B
  2. 2 Germany $323M
  3. 3 China $205M

World total: $3.6B Reported figures on UN Comtrade ↗

How these figures are built

109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. UN Comtrade records Taiwan as "Other Asia, not elsewhere specified". Saudi Arabia's exports under that code are left out: they are far too large to be trade with Taiwan, so mostly undisclosed partners. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).

Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.

Brazil NCM code for 8466.10

Brazil does not split HS 8466.10: its NCM code is 8466.10.00.

  1. 8466.10.00 Tool holders and self-opening dieheadsPorta-ferramentas e fieiras de abertura automática

All Brazil NCM codes in heading 84.66 →

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.

Questions about HS 8466.10

What is HS code 846610?

HS code 846610 is a 6-digit subheading in the Harmonized System that covers: Parts & accessories suited for use solely/principally with machines of headings 8456-8465; tool holders and self-opening dieheads. This HS code encompasses essential parts and accessories specifically designed for machine tools falling under headings 8456-8465, with a particular focus on tool holders and self-opening dieheads. These components are critical for the precision, efficiency, and versatility of modern manufacturing machinery, including CNC lathes, milling machines, and grinding equipment. Tool holders secure cutting tools, ensuring stability and accuracy during machining, while self-opening dieheads are used for efficient external threading operations. Major importers and exporters in this segment are countries with advanced manufacturing sectors, such as Germany, Japan, China, and the USA, where high-tech industries like automotive, aerospace, and mold making demand sophisticated tooling solutions. Key trade considerations include material quality, precision engineering, compatibility with various machine systems, and the integration of quick-change mechanisms to minimize downtime and maximize productivity in industrial settings.

What products fall under HS code 846610?

CNC tool holders, lathe chucks, milling machine arbors, self-opening die heads, quick-change tool posts, collet chucks, boring bar holders, tap holders

What are common misclassifications for HS code 846610?

This code can be confused with 846693 (other parts for 8456-8465) if the item is not clearly a tool holder or diehead, or with cutting tools themselves (8207) if the distinction between tool and holder is blurred.

Which countries are the top exporters of goods under HS code 846610?

In 2025, the top exporters of HS code 846610 in UN Comtrade data were Germany ($866M, 25% of world exports), Taiwan (about $419M) and the United States ($250M). World exports came to about $3.5B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Which countries are the top importers of goods under HS code 846610?

In 2025, the top importers of HS code 846610 in UN Comtrade data were the United States ($1.0B, 30% of world imports), Germany ($323M) and China ($205M). World imports came to about $3.6B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

How is HS code 846610 structured?

HS code 846610 is a 6-digit subheading under the Harmonized System. The first 2 digits (84) identify the chapter, digits 3-4 (66) identify the heading, and digits 5-6 (10) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 846610?

In Brazil, HS code 846610 is NCM 8466.10.00. The last two digits are 00 because Brazil does not split this HS code further.