HS Code 731821: Iron or steel; non-threaded spring washers and other lock washers

Q: Is HS code 731821 the same in every country?

Yes — HS code 731821 is part of the WCO Harmonized System and is the same in every WCO member country at the 6-digit level. Beyond 6 digits, each country extends the code under its own system (e.g. HTSUS in the US, CN/TARIC in the EU, HSK in Korea, CCCHS in China) for national tariff rates and trade statistics. To see how a specific country classifies this code, select a country.

Q: Which WCO edition does HS code 731821 belong to, and has it been reclassified?

The Harmonized System is maintained by the World Customs Organization (WCO) and revised approximately every five years. The current edition is HS 2022, which replaced HS 2017 on 1 January 2022. Codes are added, merged, or split between editions to reflect new products and trade patterns, so a code valid in one edition may not exist or may mean something different in another.

Q: How do I find the correct country-specific version of HS code 731821?

Beyond the international 6-digit level, each country adds its own digits — the US extends to 10 digits (HTSUS), the EU to 8 or 10 (CN/TARIC), China to 13 (CCCHS), Korea to 10 (HSK), Japan to 9, and so on. To find the full code used by a specific country, select a country in TradeInt's HS Code Tool and search for 731821.

What is HS Code 731821

HS Code 731821 covers Iron or steel; non-threaded spring washers and other lock washers. It is a 6-digit subheading — the deepest level of the international HS — within: · Section XV — Base metals and articles of base metal · Chapter 73 — Articles of iron or steel · Heading 7318 — Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel. At 6 digits, this code is the same in every HS-adopting country. From digit 7 onward, each country extends it.

Explore global 2026 latest import export trade data and shipment records for Spring and Lock Washers on TradeInt global trade data platform

What does HS Code 731821 Iron or steel; non-threaded spring washers and other lock washers Cover?

Section XV

Chapters (72-83) Base metals and articles of base metal

Chapter 73

Articles of iron or steel

HS Code 7318

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

HS Code 731821

Iron or steel; non-threaded spring washers and other lock washers

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What HS Codes for Iron and Steel Articles Do Not Cover

Chapter 73 covers articles of iron or steel — tubes, fittings, structures, hardware. Goods frequently misclassified here but that belong elsewhere include:

Machinery and mechanical appliances

Chapter 84

Tools and cutlery

Chapter 82

Vehicle parts

Chapter 87

Furniture of steel

Chapter 94

This list highlights common classification errors only — it is not exhaustive. For binding classification, work with a licensed customs broker or qualified trade compliance professional.

Top Trading Countries for Spring and Lock Washers HS 731821

United States of America

Key Importer & Exporter

Japan

Key Importer & Exporter

India

Key Importer & Exporter

Frequently Asked Questions

What is HS code 731821?

HS code 731821 covers Iron or steel; non-threaded spring washers and other lock washers under the WCO Harmonized System. It belongs to Chapter 73 (Articles of iron or steel), Heading 7318, and represents the most specific level of classification that is harmonized internationally.

Is HS code 731821 the same in every country?

Which WCO edition does HS code 731821 belong to, and has it been reclassified?

How do I find the correct country-specific version of HS code 731821?