HS code · 6-digit subheading
HS Code 7318.15 – Iron or steel; threaded screws and bolts n.e.c. in item no. 7318.1, whether or not with their nuts or washers
HS code 7318.15 is the 6-digit subheading for iron or steel, threaded screws and bolts n.e.c. in item no. 7318.1, whether or not with their nuts or washers. It is used for hex head bolts, carriage bolts, machine screws, lag screws and cap screws.
What HS 7318.15 covers
This HS code encompasses a wide array of threaded screws and bolts made from iron or steel, which are fundamental components in nearly every manufacturing and construction sector globally. These fasteners are designed to join materials securely, often in conjunction with nuts or washers, and are critical for the structural integrity and functionality of countless products. International trade in these items is driven by the vast demands of industries such as automotive, aerospace, machinery manufacturing, and building construction. Importers typically include large-scale assembly plants, hardware wholesalers, and MRO (Maintenance, Repair, and Operations) suppliers. Exporters are often specialized industrial fastener manufacturers, many of whom operate in regions with strong steel production capabilities. Key considerations for trade involve material grades (e.g., carbon steel, stainless steel), thread types (e.g., metric, imperial), coatings (e.g., zinc plating, hot-dip galvanizing for corrosion resistance), and adherence to international standards like ISO, DIN, and ASTM, which ensure compatibility and performance across diverse markets and applications.
- Covers
- Hex head bolts
- Carriage bolts
- Machine screws
- Lag screws
- Cap screws
- Eye bolts
- U-bolts
- Anchor bolts
- Examples
- Fastenal hex bolts
- Würth machine screws
- Böllhoff self-tapping screws
- ITW Buildex anchor bolts
Codes often confused with 7318.15
Common mistake. This code can be confused with 731816 (threaded nuts) or 731819 (other threaded articles), but 731815 specifically covers screws and bolts, often including their accompanying nuts or washers.
Top exporters and importers of HS code 731815, 2025
In 2025, the largest exporter of HS code 731815 in UN Comtrade data was China, with 20% of world exports; the largest importer in UN Comtrade data was the United States, with 13% 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 China $4.5B 20% of world exports
- 2 Germany $3.2B 14% of world exports
- 3 United States $2.5B 11% of world exports
World total: $22.7B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $2.8B 13% of world imports
- 2 Germany $2.2B 9.8% of world imports
- 3 Mexico $1.5B 6.7% of world imports
World total: $22.3B 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 7318.15
Brazil does not split HS 7318.15: its NCM code is 7318.15.00.
All Brazil NCM codes in heading 73.18 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
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 HS 7318.15
What is HS code 731815?
HS code 731815 is a 6-digit subheading in the Harmonized System that covers: Iron or steel; threaded screws and bolts n.e.c. in item no. 7318.1, whether or not with their nuts or washers. This HS code encompasses a wide array of threaded screws and bolts made from iron or steel, which are fundamental components in nearly every manufacturing and construction sector globally. These fasteners are designed to join materials securely, often in conjunction with nuts or washers, and are critical for the structural integrity and functionality of countless products. International trade in these items is driven by the vast demands of industries such as automotive, aerospace, machinery manufacturing, and building construction. Importers typically include large-scale assembly plants, hardware wholesalers, and MRO (Maintenance, Repair, and Operations) suppliers. Exporters are often specialized industrial fastener manufacturers, many of whom operate in regions with strong steel production capabilities. Key considerations for trade involve material grades (e.g., carbon steel, stainless steel), thread types (e.g., metric, imperial), coatings (e.g., zinc plating, hot-dip galvanizing for corrosion resistance), and adherence to international standards like ISO, DIN, and ASTM, which ensure compatibility and performance across diverse markets and applications.
What products fall under HS code 731815?
Hex head bolts, carriage bolts, machine screws, lag screws, cap screws, eye bolts, U-bolts, anchor bolts
What are common misclassifications for HS code 731815?
This code can be confused with 731816 (threaded nuts) or 731819 (other threaded articles), but 731815 specifically covers screws and bolts, often including their accompanying nuts or washers.
Which countries are the top exporters of goods under HS code 731815?
In 2025, the top exporters of HS code 731815 in UN Comtrade data were China ($4.5B, 20% of world exports), Germany ($3.2B) and the United States ($2.5B). World exports came to about $22.7B, 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.
Which countries are the top importers of goods under HS code 731815?
In 2025, the top importers of HS code 731815 in UN Comtrade data were the United States ($2.8B, 13% of world imports), Germany ($2.2B) and Mexico ($1.5B). World imports came to about $22.3B, 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 731815 structured?
HS code 731815 is a 6-digit subheading under the Harmonized System. The first 2 digits (73) identify the chapter, digits 3-4 (18) identify the heading, and digits 5-6 (15) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 731815?
In Brazil, HS code 731815 is NCM 7318.15.00. The last two digits are 00 because Brazil does not split this HS code further.