# United States tariff lines under HS 7318.21

> The United States tariff splits HS 7318.21 (non-threaded articles: Spring washers and other lock washers) into 2 national lines: 7318.21.00.30 (helical spring lock washers) and 7318.21.00.90 (other). The general (MFN) duty is 5.8% on all 2 lines.

Source: https://border.bot/countries/united-states/hs-codes/731821
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 73](https://border.bot/countries/united-states/hs-codes/73) / [7318.21](https://border.bot/countries/united-states/hs-codes/731821)

## Key facts

- HS subheading: [7318.21](https://border.bot/hs-codes/731821)
- Duty (MFN): 5.8%
- National lines: 2
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 73: Articles of iron or steel

## United States lines under 7318.21

The United States tariff splits HS 7318.21 (non-threaded articles: Spring washers and other lock washers) into 2 national lines: 7318.21.00.30 (helical spring lock washers) and 7318.21.00.90 (other).

The general (MFN) duty is 5.8% on all 2 lines.

- [7318.21.00.30](https://border.bot/countries/united-states/hs-codes/7318210030) Non-threaded articles, Spring washers and other lock washers, Helical spring lock washers. Duty (MFN): 5.8%
- [7318.21.00.90](https://border.bot/countries/united-states/hs-codes/7318210090) Non-threaded articles, Spring washers and other lock washers, Other. Duty (MFN): 5.8%

## In other countries

No other national tariff on border.bot has live lines under 7318.21 yet.

- [The Harmonized System text for 7318.21](https://border.bot/hs-codes/731821)

- Previous subheading: [7318.19](https://border.bot/countries/united-states/hs-codes/731819) Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel
- Next subheading: [7318.22](https://border.bot/countries/united-states/hs-codes/731822) Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 7318.21?

The United States tariff splits HS 7318.21 (non-threaded articles: Spring washers and other lock washers) into 2 national lines: 7318.21.00.30 (helical spring lock washers) and 7318.21.00.90 (other).

### What is the duty on HS 7318.21 in the United States?

The general (MFN) duty is 5.8% on all 2 lines.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/731821.json