HS code · 6-digit subheading
HS Code 8540.91 – Tubes; parts of cathode-ray tubes
HS code 8540.91 is the 6-digit subheading for tubes, parts of cathode-ray tubes. It is used for electron guns, deflection coils, phosphor screens (unmounted), glass envelopes (for CRTs) and anode caps.
What HS 8540.91 covers
This HS code specifically covers parts and components used in the manufacture or repair of cathode-ray tubes (CRTs). While CRTs have largely been superseded by flat-panel displays in mainstream consumer electronics, they retain vital applications in specialized fields such as oscilloscopes, radar displays, medical imaging, and certain industrial monitors where their unique characteristics (e.g., high refresh rates, robust construction) are still advantageous. Trade in these parts is highly specialized, involving manufacturers supplying niche markets or maintaining legacy equipment. Exporters are typically countries with historical expertise in CRT manufacturing or those that continue to produce components for these specialized applications, such as Japan, Germany, and the USA. Importers are often repair facilities, industrial equipment manufacturers, or defense contractors. Key trade considerations include precision engineering, material quality, and compatibility with specific CRT models, supporting a critical, albeit smaller, segment of the electronics industry.
- Covers
- Electron guns
- Deflection coils
- Phosphor screens (unmounted)
- Glass envelopes (for CRTs)
- Anode caps
- Cathode assemblies
- Focus coils
- Examples
- Components for Tektronix oscilloscopes
- Parts for vintage arcade monitors
- Replacement parts for industrial CRT displays
- Components for medical imaging CRTs
- Electron gun assemblies for specialized CRTs
Codes often confused with 8540.91
Common mistake. This code is specifically for parts of cathode-ray tubes. It's important not to confuse it with complete cathode-ray tubes themselves (854040) or parts of other types of valves and tubes (854099).
Top exporters and importers of HS code 854091, 2025
In 2025, the largest exporter of HS code 854091 in UN Comtrade data was Austria, with 34% of world exports; the largest importer in UN Comtrade data was Austria, with 43% 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 Austria $24M 34% of world exports
- 2 Serbia $14M 19% of world exports
- 3 United States $11M 15% of world exports
World total: $72M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Austria $31M 43% of world imports
- 2 Taiwan* ~$12M 16% of world imports · partner records ↗
- 3 Germany $9.7M 14% of world imports
World total: $71M 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 codes for 8540.91 5
Brazil splits HS 8540.91 into 5 NCM codes, Mercosur's 8-digit tariff lines.
- 8540.91.10 CRT deflection yokesBobinas de deflexão (yokes)
- 8540.91.20 Ferromagnetic cores for CRT deflection yokesNúcleos de pó ferromagnético para bobinas de deflexão (yokes)
- 8540.91.30 CRT electron gunsCanhões eletrônicos
- 8540.91.40 Assembled CRT panel, shadow mask and shieldPainel de vidro, máscara de sombra e blindagem interna, reunidos, para tubos tricromáticos
- 8540.91.90 Other parts of cathode-ray tubesOutras
All Brazil NCM codes in heading 85.40 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 8540.91
What is HS code 854091?
HS code 854091 is a 6-digit subheading in the Harmonized System that covers: Tubes; parts of cathode-ray tubes. This HS code specifically covers parts and components used in the manufacture or repair of cathode-ray tubes (CRTs). While CRTs have largely been superseded by flat-panel displays in mainstream consumer electronics, they retain vital applications in specialized fields such as oscilloscopes, radar displays, medical imaging, and certain industrial monitors where their unique characteristics (e.g., high refresh rates, robust construction) are still advantageous. Trade in these parts is highly specialized, involving manufacturers supplying niche markets or maintaining legacy equipment. Exporters are typically countries with historical expertise in CRT manufacturing or those that continue to produce components for these specialized applications, such as Japan, Germany, and the USA. Importers are often repair facilities, industrial equipment manufacturers, or defense contractors. Key trade considerations include precision engineering, material quality, and compatibility with specific CRT models, supporting a critical, albeit smaller, segment of the electronics industry.
What products fall under HS code 854091?
Electron guns, Deflection coils, Phosphor screens (unmounted), Glass envelopes (for CRTs), Anode caps, Cathode assemblies, Focus coils
What are common misclassifications for HS code 854091?
This code is specifically for parts of cathode-ray tubes. It's important not to confuse it with complete cathode-ray tubes themselves (854040) or parts of other types of valves and tubes (854099).
Which countries are the top exporters of goods under HS code 854091?
In 2025, the top exporters of HS code 854091 in UN Comtrade data were Austria ($24M, 34% of world exports), Serbia ($14M) and the United States ($11M). World exports came to about $72M, 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 854091?
In 2025, the top importers of HS code 854091 in UN Comtrade data were Austria ($31M, 43% of world imports), Taiwan (about $12M) and Germany ($9.7M). World imports came to about $71M, 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 854091 structured?
HS code 854091 is a 6-digit subheading under the Harmonized System. The first 2 digits (85) identify the chapter, digits 3-4 (40) identify the heading, and digits 5-6 (91) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 854091?
Brazil splits HS code 854091 into 5 NCM codes: 8540.91.10 (CRT deflection yokes), 8540.91.20 (Ferromagnetic cores for CRT deflection yokes), 8540.91.30 (CRT electron guns), 8540.91.40 (Assembled CRT panel, shadow mask and shield), 8540.91.90 (Other parts of cathode-ray tubes). The first 6 digits of each match the HS code.