Product classification
HS code for Drilling machine parts: 8431.43
Boring or sinking machinery, parts for boring or sinking machinery of subheading 8430.41 or 8430.49.
Classification of drilling machine parts under HS 8431.43
The classification of parts for drilling machinery under HS code 8431.43 is governed by Note 2 to Section XVI of the Harmonized System. Heading 8431 is a parts heading, specifically for components that are suitable for use solely or principally with the machinery of headings 8425 to 8430. Subheading 8431.43 is dedicated to parts of boring or sinking machinery, which are classified under subheadings 8430.41 or 8430.49. These machines are typically used in the extraction of oil, gas, or minerals, and for well-drilling operations. To qualify for 8431.43, the part must not be excluded by the Section or Chapter notes (such as joints or belts of vulcanized rubber) and must be identifiable as a component of the specific machinery mentioned. This classification includes heavy-duty components designed to withstand the high torque and pressure of subterranean drilling. It does not include the interchangeable tools (bits) themselves, which are classified in Chapter 82. The determination of solely or principally is critical; if a part is a general-purpose component like a screw, bolt, or nut, it is classified in its respective material heading (e.g., Chapter 73 for steel fasteners). However, specialized items like drill collars or kelly joints that have no other use than in a boring machine are correctly placed in 8431.43. This code is vital for the global energy and mining sectors, ensuring that the complex supply chain for drilling infrastructure is accurately tracked and taxed.
- Covers
- Drill collars for oil field use
- Kellys and kelly joints
- Rotary tables for drilling rigs
- Stabilizers for drill strings
- Drive bushings
- Parts for well-sinking machinery
- Also under 8431.43
- Sandvik drill bits
- Epiroc rock drilling tools
- National Oilwell Varco (NOV) drill pipe
- Schlumberger drilling components
- Boart Longyear core drilling parts
Codes often confused with 8431.43
Common mistake. A common mistake is classifying these parts under 8466, which covers parts for metal-removing machine tools. HS code 8431.43 is specifically for earth-boring and well-sinking machinery parts. Another error involves classifying drill pipe under this code; however, drill pipe is usually classified by its material and construction under 7304.22 or 7304.23. Interchangeable drill bits are also often wrongly included here instead of 8207.19.
Top exporters and importers of HS 843143 (the code used for drilling machine parts), 2025
In 2025, the largest exporter of HS 843143 (the code used for drilling machine parts) in UN Comtrade data was China, with 24% of world exports; the largest importer in UN Comtrade data was the United States, with 10% 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 843143, not only drilling machine parts.
Top exporters 2025 · share of world exports
- 1 China $2.7B 24% of world exports
- 2 United States $1.7B 15% of world exports
- 3 Singapore $889M 7.9% of world exports
World total: $11.2B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $1.1B 10% of world imports
- 2 Saudi Arabia $976M 9.4% of world imports
- 3 Singapore $576M 5.5% of world imports
World total: $10.4B 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 that did not report are estimated from what other countries recorded trading with them. 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. 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 codes for drilling machine parts
Brazil splits HS 8431.43 into 2 NCM codes. Pick the one that matches your product:
- 8431.43.10Parts of rotary boring machines
- 8431.43.90Other parts of boring or sinking machinery
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about drilling machine parts
What is the HS code for Drilling machine parts?
The HS code for Drilling machine parts is 843143 (Boring or sinking machinery; parts for boring or sinking machinery of subheading 8430.41 or 8430.49). Parts for boring or sinking machinery (oil, gas, or water wells) are classified under HS code 8431.43.
How do I classify Drilling machine parts for customs?
Drilling machine parts is classified under HS code 843143 — Boring or sinking machinery; parts for boring or sinking machinery of subheading 8430.41 or 8430.49. This is a 6-digit subheading level code.
Are hydraulic pumps for drilling rigs classified here?
No, hydraulic pumps are classified under heading 8413, as they are specifically mentioned in their own heading, which takes precedence over a general parts heading like 8431.
Which countries are the top exporters of drilling machine parts (HS 843143)?
In 2025, the top exporters of HS 843143 (the code used for drilling machine parts) in UN Comtrade data were China ($2.7B, 24% of world exports), the United States ($1.7B) and Singapore ($889M). World exports came to about $11.2B, 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 drilling machine parts (HS 843143)?
In 2025, the top importers of HS 843143 (the code used for drilling machine parts) in UN Comtrade data were the United States ($1.1B, 10% of world imports), Saudi Arabia ($976M) and Singapore ($576M). World imports came to about $10.4B, 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 Drilling machine parts the same in all countries?
The base HS code 843143 for Drilling machine parts 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 drilling machine parts in Brazil?
Brazil splits HS 843143 into 2 NCM codes, so the right one for drilling machine parts depends on the product's details: 8431.43.10 (Parts of rotary boring machines), 8431.43.90 (Other parts of boring or sinking machinery).