Product classification
HS code for Glass fiber threads: 7019.19
Glass fibres, (including glass wool), threads and mats, other than mechanically or chemically bonded mats.
Classification of glass fiber threads under HS 7019.19
Glass fiber threads are classified under HS code 7019.19, which serves as a specific category for glass fibers and articles thereof that are not mechanically or chemically bonded into mats, and specifically those that do not meet the technical definition of yarns or slivers. The classification is determined by the physical state of the glass filaments. These threads are typically produced through the extrusion of molten glass through platinum-rhodium bushings, resulting in fine filaments. Under the Harmonized System, heading 7019 covers a wide range of glass fiber products, but sub-heading 7019.19 is reserved for threads, chopped strands, and rovings that are distinct from the twisted structures found in yarns. The classification depends on the absence of a specific twist or plying that would otherwise categorize the material as a yarn under 7019.13. These threads are essential in the production of composite materials, providing structural reinforcement without the bulk of woven fabrics.
- Covers
- Chopped glass fiber strands
- Glass fiber rovings
- Continuous glass fiber filaments
- Glass wool threads for insulation
- Non-twisted glass fiber bundles
- Also under 7019.19
- Owens Corning Advantex Glass Fiber
- Jushi E-Glass Chopped Strands
- PPG Fiber Glass Rovings
- Johns Manville Micro-Pak Glass Fiber
- Saint-Gobain Vetrotex Yarns
Codes often confused with 7019.19
Common mistake. The most frequent misclassification occurs with HS code 7019.13, which is designated for glass fiber yarns and slivers. The primary distinction lies in the mechanical structure; yarns are typically twisted or plied, whereas threads under 7019.19 are often untwisted filaments or rovings. Additionally, 7019.31 is often confused with this code when the threads are lightly bonded into a mat-like form, but 7019.31 requires specific mechanical or chemical bonding. Another common error involves 7019.11, which is strictly for chopped strands of a length not exceeding 50 mm.
Top exporters and importers of HS 701919 (the code used for glass fiber threads), 2025
In 2025, the largest exporter of HS 701919 (the code used for glass fiber threads) in UN Comtrade data was the United States, with 22% of world exports; the largest importer in UN Comtrade data was the United States, with 11% 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 701919, not only glass fiber threads.
Top exporters 2025 · share of world exports
- 1 United States $63M 22% of world exports
- 2 China $50M 17% of world exports
- 3 France $21M 7.5% of world exports
World total: $288M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $56M 11% of world imports
- 2 France $46M 8.9% of world imports
- 3 Canada $43M 8.3% of world imports
World total: $515M 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 code for glass fiber threads
Brazil classifies glass fiber threads under NCM 7019.19.00: HS 7019.19 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about glass fiber threads
What is the HS code for Glass fiber threads?
The HS code for Glass fiber threads is 701919 (Glass fibres; (including glass wool), threads and mats, other than mechanically or chemically bonded mats). The primary HS code for glass fiber threads, including rovings and chopped strands not exceeding specific lengths, is 7019.19.
How do I classify Glass fiber threads for customs?
Glass fiber threads is classified under HS code 701919 — Glass fibres; (including glass wool), threads and mats, other than mechanically or chemically bonded mats. This is a 6-digit subheading level code.
Are glass fiber threads the same as glass yarn?
No, for customs purposes, glass yarn (7019.13) consists of twisted filaments, while glass fiber threads (7019.19) generally refer to untwisted filaments or rovings used for reinforcement.
Which countries are the top exporters of glass fiber threads (HS 701919)?
In 2025, the top exporters of HS 701919 (the code used for glass fiber threads) in UN Comtrade data were the United States ($63M, 22% of world exports), China ($50M) and France ($21M). World exports came to about $288M, 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 glass fiber threads (HS 701919)?
In 2025, the top importers of HS 701919 (the code used for glass fiber threads) in UN Comtrade data were the United States ($56M, 11% of world imports), France ($46M) and Canada ($43M). World imports came to about $515M, 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 Glass fiber threads the same in all countries?
The base HS code 701919 for Glass fiber threads 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 glass fiber threads in Brazil?
In Brazil, glass fiber threads (HS 701919) is classified under NCM 7019.19.00.