United States of America HS Code

HS Code 731821: Nonthreaded articles : Spring washers and other lock washers in United States of America

Q: Is HS code 731821 the same across all countries?

Yes — up to the 6-digit level, HS code 731821 is the same in every WCO member country. Beyond 6 digits, each country extends the code for national tariff and statistical use. United States of America extends it under HTS / HTSUS.

Q: What system does United States of America use to classify HS code 731821?

United States of America classifies products under the Harmonized Tariff Schedule of the United States (HTS / HTSUS; locally Harmonized Tariff Schedule), which extends HS codes to 10 digits. The first 6 digits align with the WCO Harmonized System, and the rest cover national tariff and statistical needs.

Q: Where can I officially look up HS code 731821 in United States of America?

The official source is https://www.cbp.gov/. For faster cross-country lookups, TradeInt's HS Code Tool consolidates classifications across all major countries in one place.

What is HS Code 731821 in United States of America

Under United States of America's Harmonized Tariff Schedule of the United States (Harmonized Tariff Schedule), HS Code 731821 is the WCO Harmonized System subheading for Nonthreaded articles : Spring washers and other lock washers. This is the most detailed internationally standardized level; United States of America extends classifications to 10 digits under its national tariff system. 731821 belongs to 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.

Explore more 2026 Latest United States of America import export trade data and shipment records for HS Code Spring and Lock Washers on TradeInt global trade data platform

Classification Path of HS Code 731821 in United States of America

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

Nonthreaded articles : Spring washers and other lock washers

HS Code 73182100

Spring washers and other lock washers

HS Code 7318210030

Helical spring lock washers

HS Code 7318210090

Other

United States of America Tariff Classification: Harmonized Tariff Schedule of the United States (HTS / HTSUS)

In United States of America, HS 731821 is classified under the Harmonized Tariff Schedule of the United States (Harmonized Tariff Schedule) — a 10-digit national extension of the WCO 6-digit Harmonized System.

Tariff schedule Harmonized Tariff Schedule of the United States (HTS / HTSUS)

Local name Harmonized Tariff Schedule

Digits 10

Official source https://www.cbp.gov/

You know what 731821 means. Now see 2026 latest real trade activity for Spring and Lock Washers in United States of America.

Buyers, suppliers, origin and destination countries, shipment dates, and quantities direct from customs records.

Search 2026 Latest United States of America Import Data Search 2026 Latest United States of America Export Data

Top Trading Product of HS Code 7318

Top United States of America import Product Under HS Code 7318

1 731815: Threaded articles : Other screws and bolts, whether or not with their nuts or washers $2.5B 2 731816: Threaded articles : Nuts $1.2B 3 731814: Threaded articles : Selftapping screws $1.1B

Figures shown for 2025.

For more 2026 recent data, search for United States of America import trade records

Top United States of America export Product Under HS Code 7318

1 731815: Threaded articles : Other screws and bolts, whether or not with their nuts or washers $2.5B 2 731816: Threaded articles : Nuts $1.2B 3 731829: Nonthreaded articles : Other $575.2M

Figures shown for 2025.

For more 2026 recent data, search for United States of America export trade records

Related HS Code to United States of America Spring and Lock Washers (731821)

HS Code 73182100

Spring washers and other lock washers

HS Code 7318210030

Helical spring lock washers

HS Code 7318210090

Other

HS Code 731811

Threaded articles : Coach screws

HS Code 731812

Threaded articles : Other wood screws

HS Code 731813

Threaded articles : Screw hooks and screw rings

HS Code 731814

Threaded articles : Selftapping screws

HS Code 731815

Threaded articles : Other screws and bolts, whether or not with their nuts or washers

HS Code 731816

Threaded articles : Nuts

HS Code 731819

Threaded articles : Other

Frequently Asked Questions

What is HS code 731821 in United States of America?

HS code 731821 covers Nonthreaded articles : Spring washers and other lock washers in United States of America. It sits in Chapter 73 (Articles of iron or steel), Heading 7318 of the Harmonized System, and is classified under HTS / HTSUS.

Is HS code 731821 the same across all countries?

What system does United States of America use to classify HS code 731821?

Where can I officially look up HS code 731821 in United States of America?