HS Code Heading

Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel

73.18 Heading
Section XV — Base metals and articles of base metal

About HS Code 7318

Heading 7318 encompasses an incredibly vast and critical category of fasteners and connecting elements made of iron or steel, including screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, and washers (including spring washers). This heading is fundamental to almost every manufacturing and construction sector globally. The scope is broad, covering standard and specialized threaded and unthreaded fasteners, all united by their iron or steel composition. It is crucial for trade compliance due to the sheer volume and variety of products, each potentially subject to different specifications, quality standards, and end-use applications. Key sub-categories often distinguish between machine screws, self-tapping screws, wood screws, carriage bolts, hex nuts, wing nuts, lock washers, flat washers, pop rivets, and solid rivets. The accurate classification within 7318 is paramount for determining applicable import duties, ensuring compliance with technical standards (e.g., ISO, DIN, ASTM), and managing supply chain logistics for industries ranging from automotive and aerospace to electronics, machinery, and infrastructure. As a core component of Chapter 73, this heading underscores the importance of material composition (iron or steel) as the primary classification criterion for articles of base metal. Its historical context reveals its enduring significance, evolving from basic blacksmithing to highly engineered components essential for modern industrial production and robust infrastructure.

Products Under This Code

Hex head bolts, carriage bolts, machine screws, self-tapping screws, wood screws, drywall screws, cap screws, lag screws, eye bolts, U-bolts, J-bolts, hex nuts, lock nuts, wing nuts, castle nuts, flange nuts, flat washers, spring washers, lock washers, cotter pins, split pins, solid rivets, blind rivets, pop rivets, threaded rods, stud bolts, grub screws, set screws

Real World Examples

A German automotive manufacturer imports a massive volume of high-tensile steel bolts, nuts, and washers from a specialized fastener producer in Japan for assembling vehicle chassis and engines, transported via ocean freight and then rail. A construction company in Australia sources various types of galvanized screws, coach screws, and large structural bolts from Taiwan for building commercial properties, typically shipped in bulk containers. An electronics assembly plant in Mexico imports miniature machine screws and spring washers from China for consumer electronics production, often utilizing air freight for time-sensitive components. A heavy machinery manufacturer in the United States procures specialized high-strength rivets and custom bolts from a European supplier for its industrial equipment, managing complex logistics for these critical parts.

Common Misclassification

Misclassification under 7318 frequently occurs when fasteners are integrated into more complex items or when their material composition is overlooked. One common error is confusing specialized fasteners that are explicitly designed as parts of specific machines or vehicles. For instance, if a bolt is clearly identifiable as a part of a motor vehicle (e.g., a specific engine bolt), it might be classified under Chapter 87 ('Vehicles other than railway or tramway rolling-stock, and parts and accessories thereof') rather than 7318. Another mistake involves fasteners made of other base metals; for example, copper fasteners would fall under 7415, and aluminum fasteners under 7616. Lastly, certain items like threaded pipe fittings are often confused with fasteners but are correctly classified under 7307 ('Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel'), highlighting the importance of functional distinction.

Subheadings 12

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.

Industry

This code belongs to the Automotive & Vehicles industry.

Trade Overview

China is the largest global exporter of fasteners under 7318, driven by its vast manufacturing capacity and competitive pricing. Germany, Japan, Taiwan, and the United States are also major players, particularly for high-precision and specialized fasteners. Key importing regions include the United States, the European Union, Mexico, and major industrial economies globally. Trade agreements like the USMCA, the EU-Japan EPA, and various bilateral FTAs can significantly influence tariffs and market access. Anti-dumping duties on certain fasteners (e.g., from China or Taiwan into the EU or US) are a recurring consideration, requiring careful monitoring by importers to ensure compliance and avoid unexpected costs.

Frequently Asked Questions

What is HS code 7318?

HS code 7318 is a 4-digit heading in the Harmonized System that covers: Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel. Heading 7318 encompasses an incredibly vast and critical category of fasteners and connecting elements made of iron or steel, including screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, and washers (including spring washers). This heading is fundamental to almost every manufacturing and construction sector globally. The scope is broad, covering standard and specialized threaded and unthreaded fasteners, all united by their iron or steel composition. It is crucial for trade compliance due to the sheer volume and variety of products, each potentially subject to different specifications, quality standards, and end-use applications. Key sub-categories often distinguish between machine screws, self-tapping screws, wood screws, carriage bolts, hex nuts, wing nuts, lock washers, flat washers, pop rivets, and solid rivets. The accurate classification within 7318 is paramount for determining applicable import duties, ensuring compliance with technical standards (e.g., ISO, DIN, ASTM), and managing supply chain logistics for industries ranging from automotive and aerospace to electronics, machinery, and infrastructure. As a core component of Chapter 73, this heading underscores the importance of material composition (iron or steel) as the primary classification criterion for articles of base metal. Its historical context reveals its enduring significance, evolving from basic blacksmithing to highly engineered components essential for modern industrial production and robust infrastructure.

What products fall under HS code 7318?

Hex head bolts, carriage bolts, machine screws, self-tapping screws, wood screws, drywall screws, cap screws, lag screws, eye bolts, U-bolts, J-bolts, hex nuts, lock nuts, wing nuts, castle nuts, flange nuts, flat washers, spring washers, lock washers, cotter pins, split pins, solid rivets, blind rivets, pop rivets, threaded rods, stud bolts, grub screws, set screws

What are common misclassifications for HS code 7318?

Misclassification under 7318 frequently occurs when fasteners are integrated into more complex items or when their material composition is overlooked. One common error is confusing specialized fasteners that are explicitly designed as parts of specific machines or vehicles. For instance, if a bolt is clearly identifiable as a part of a motor vehicle (e.g., a specific engine bolt), it might be classified under Chapter 87 ('Vehicles other than railway or tramway rolling-stock, and parts and accessories thereof') rather than 7318. Another mistake involves fasteners made of other base metals; for example, copper fasteners would fall under 7415, and aluminum fasteners under 7616. Lastly, certain items like threaded pipe fittings are often confused with fasteners but are correctly classified under 7307 ('Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel'), highlighting the importance of functional distinction.

Which countries trade the most under HS code 7318?

China is the largest global exporter of fasteners under 7318, driven by its vast manufacturing capacity and competitive pricing. Germany, Japan, Taiwan, and the United States are also major players, particularly for high-precision and specialized fasteners. Key importing regions include the United States, the European Union, Mexico, and major industrial economies globally. Trade agreements like the USMCA, the EU-Japan EPA, and various bilateral FTAs can significantly influence tariffs and market access. Anti-dumping duties on certain fasteners (e.g., from China or Taiwan into the EU or US) are a recurring consideration, requiring careful monitoring by importers to ensure compliance and avoid unexpected costs.

How is HS code 7318 structured?

HS code 7318 is a 4-digit heading under Chapter 73 of the Harmonized System. The first 2 digits (73) identify the chapter, and digits 3-4 (18) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.