Product classification
HS code for Threaded fasteners: 7318.19
Iron or steel, threaded screws, bolts and nuts n.e.c. in item no. 7318.1.
Classification of threaded fasteners under HS 7318.19
Threaded fasteners of iron or steel that are not specifically named in other subheadings of 7318 are classified under HS code 7318.19. Chapter 73 covers articles of iron or steel, and heading 7318 specifically addresses screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers, and similar articles. Within the threaded category (7318.11 through 7318.19), the system provides specific codes for coach screws, wood screws, screw hooks, self-tapping screws, and other bolts and nuts. HS code 7318.19 serves as a residual or "basket" category for any other threaded articles that do not fit the precise definitions of the preceding subheadings. This includes specialized industrial fasteners, threaded studs without heads, and custom-engineered threaded components. The primary requirement for classification here is that the article must be made of iron or steel and must possess a thread, whether internal or external, used for fastening purposes.
- Covers
- Threaded studs (without heads)
- Threaded plugs and bungs
- Specialized threaded fasteners for machinery
- Threaded rods cut to length for fastening
- Non-standard threaded bolts not elsewhere specified
- Also under 7318.19
- AccuGroup set screws
- Fastenal threaded rods
- Würth security screws
- Böllhoff special studs
Codes often confused with 7318.19
Common mistake. Threaded fasteners are often misclassified under 7318.15, which is for "Other screws and bolts, whether or not with their nuts or washers." If a fastener has a head and functions as a standard bolt, 7318.15 is correct; however, if it lacks a head (like a stud), 7318.19 is more appropriate. They are also sometimes confused with 7318.29, which is for non-threaded fasteners like pins or clips.
Top exporters and importers of HS 731819 (the code used for threaded fasteners), 2025
In 2025, the largest exporter of HS 731819 (the code used for threaded fasteners) in UN Comtrade data was China, with 26% of world exports; the largest importer in UN Comtrade data was Germany, with 9.1% 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 731819, not only threaded fasteners.
Top exporters 2025 · share of world exports
- 1 China $1.0B 26% of world exports
- 2 Germany $620M 16% of world exports
- 3 United States $307M 7.9% of world exports
World total: $3.9B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $334M 9.1% of world imports
- 2 France $195M 5.3% of world imports
- 3 Italy $170M 4.6% of world imports
World total: $3.7B 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 threaded fasteners
Brazil classifies threaded fasteners under NCM 7318.19.00: HS 7318.19 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
EU Regulatory Requirements
This product falls under the Carbon Border Adjustment Mechanism (CBAM). Importers to the EU must declare embedded carbon emissions and purchase CBAM certificates.
Questions about threaded fasteners
What is the HS code for Threaded fasteners?
The HS code for Threaded fasteners is 731819 (Iron or steel; threaded screws, bolts and nuts n.e.c. in item no. 7318.1). General threaded fasteners of iron or steel not specified elsewhere are classified under HS code 7318.19.
How do I classify Threaded fasteners for customs?
Threaded fasteners is classified under HS code 731819 — Iron or steel; threaded screws, bolts and nuts n.e.c. in item no. 7318.1. This is a 6-digit subheading level code.
What is the difference between 7318.15 and 7318.19?
7318.15 is specifically for standard screws and bolts (usually with heads), while 7318.19 covers other threaded items like studs or specialized fasteners that do not meet the definition of a bolt or screw.
Which countries are the top exporters of threaded fasteners (HS 731819)?
In 2025, the top exporters of HS 731819 (the code used for threaded fasteners) in UN Comtrade data were China ($1.0B, 26% of world exports), Germany ($620M) and the United States ($307M). World exports came to about $3.9B, 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 threaded fasteners (HS 731819)?
In 2025, the top importers of HS 731819 (the code used for threaded fasteners) in UN Comtrade data were Germany ($334M, 9.1% of world imports), France ($195M) and Italy ($170M). World imports came to about $3.7B, 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 Threaded fasteners the same in all countries?
The base HS code 731819 for Threaded fasteners 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 threaded fasteners in Brazil?
In Brazil, threaded fasteners (HS 731819) is classified under NCM 7318.19.00.