Product classification
HS code for Die head: 8466.10
Parts & accessories suited for use solely/principally with machines of headings 8456-8465, tool holders and self-opening dieheads.
Classification of die head under HS 8466.10
Die heads are classified under HS code 8466.10 because they are specifically identified as tool holders or self-opening dieheads designed for use with machine tools. According to the General Rules of Interpretation (GRI) 1, classification is determined by the terms of the headings and any relative Section or Chapter Notes. Heading 8466 is dedicated to parts and accessories suited for use solely or principally with the machines of headings 8456 to 8465, which include lathes, milling machines, and drilling machines. A die head is a sophisticated mechanical assembly used in threading operations. Unlike a simple fixed die, a self-opening die head contains an internal mechanism that automatically retracts the cutting chasers once the desired thread length is achieved. This allows the tool to be withdrawn from the workpiece without reversing the spindle, significantly increasing production efficiency. The engineering complexity of these units, which often include adjustable settings for thread pitch and diameter, justifies their classification as tool holders rather than basic hardware or interchangeable tools. They are essential for high-precision manufacturing environments where consistency and speed are paramount. The classification is further supported by the Explanatory Notes to heading 8466, which clarify that tool holders are devices that hold, guide, or operate the tool for specific tasks.
- Covers
- Self-opening dieheads for automatic lathes
- Stationary die heads for manual machines
- Rotary die heads for high-speed threading
- Adjustable thread-cutting die heads
- Universal die head assemblies
- Also under 8466.10
- Sandvik Coromant CoroTurn
- Kennametal KM4X
- Schunk TENDO
- Dorian Tool Quick Change Tool Post
- Horn Tool Holders
Codes often confused with 8466.10
Common mistake. Die heads are frequently confused with HS code 8207.40, which covers interchangeable tools for tapping or threading. The distinction is that 8207.40 refers to the actual cutting dies or chasers (the blades), whereas 8466.10 refers to the head or holder that contains those dies. Another common error is using 8466.93, which is a residual category for other parts of machines of headings 84.56 to 84.61. However, because 8466.10 specifically names "self-opening dieheads," it takes precedence over the general parts category.
Top exporters and importers of HS 846610 (the code used for die head), 2025
In 2025, the largest exporter of HS 846610 (the code used for die head) 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.
Figures cover everything classified under HS 846610, not only die head.
Top exporters 2025 · share of world exports
- 1 Germany $866M 25% of world exports
- 2 Taiwan* ~$419M 12% of world exports · partner records ↗
- 3 United States $250M 7.1% of world exports
World total: $3.5B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $1.0B 30% of world imports
- 2 Germany $323M 9.1% of world imports
- 3 China $205M 5.8% of world imports
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 die head
Brazil classifies die head under NCM 8466.10.00: HS 8466.10 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about die head
What is the HS code for Die head?
The HS code for Die head is 846610 (Parts & accessories suited for use solely/principally with machines of headings 8456-8465; tool holders and self-opening dieheads). The HS code for a self-opening die head is 8466.10, which falls under the category of tool holders for machine tools.
How do I classify Die head for customs?
Die head is classified under HS code 846610 — Parts & accessories suited for use solely/principally with machines of headings 8456-8465; tool holders and self-opening dieheads. This is a 6-digit subheading level code.
Can a die head be classified under Chapter 82?
No, while the cutting dies themselves are in Chapter 82, the die head assembly that holds them and attaches to a machine tool is classified in Chapter 84 under 8466.10.
Which countries are the top exporters of die head (HS 846610)?
In 2025, the top exporters of HS 846610 (the code used for die head) 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 die head (HS 846610)?
In 2025, the top importers of HS 846610 (the code used for die head) 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.
Is the HS code for Die head the same in all countries?
The base HS code 846610 for Die head is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for die head in Brazil?
In Brazil, die head (HS 846610) is classified under NCM 8466.10.00.