# HS code 7318.16: Threaded articles, nuts

> HS code 7318.16 covers threaded articles, nuts. It sits in heading 73.18 (screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel) in chapter 73 (articles of iron or steel). Other goods of heading 73.18 are classified under 7318.11 (threaded articles, coach screws), 7318.12 (threaded articles, other wood screws), 7318.13 (threaded articles, screw hooks and screw rings), 7318.14 (threaded articles, self-tapping screws) or 7 others. National tariff lines under 7318.16 are live on border.bot for the United States (5 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/731816
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 73](https://border.bot/hs-codes/73) / [73.18](https://border.bot/hs-codes/7318) / [7318.16](https://border.bot/hs-codes/731816)

## Key facts

- HS code: 7318.16
- Covers: Threaded articles, nuts
- Heading: [73.18: Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel](https://border.bot/hs-codes/7318)
- Chapter: [73: Articles of iron or steel](https://border.bot/hs-codes/73)
- Edition: HS2022
- Duty in the United States: [See its 5 lines](https://border.bot/countries/united-states/hs-codes/731816)

## What this code covers

HS code 7318.16 covers threaded articles, nuts.

The legal text of the subheading is “Threaded articles: Nuts”, read under “Threaded articles”, in HS2022.

## What it doesn’t cover

Other goods of heading 73.18 are classified under 7318.11 (threaded articles, coach screws), 7318.12 (threaded articles, other wood screws), 7318.13 (threaded articles, screw hooks and screw rings), 7318.14 (threaded articles, self-tapping screws) or 7 others.

- [7318.11](https://border.bot/hs-codes/731811) Threaded articles: Coach screws
- [7318.12](https://border.bot/hs-codes/731812) Threaded articles: Other wood screws
- [7318.13](https://border.bot/hs-codes/731813) Threaded articles: Screw hooks and screw rings
- [7318.14](https://border.bot/hs-codes/731814) Threaded articles: Self-tapping screws
- [7318.15](https://border.bot/hs-codes/731815) Threaded articles: Other screws and bolts, whether or not with their nuts or washers
- [7318.19](https://border.bot/hs-codes/731819) Threaded articles: Other
- [7318.21](https://border.bot/hs-codes/731821) Non-threaded articles: Spring washers and other lock washers
- [7318.22](https://border.bot/hs-codes/731822) Non-threaded articles: Other washers
- [7318.23](https://border.bot/hs-codes/731823) Non-threaded articles: Rivets
- [7318.24](https://border.bot/hs-codes/731824) Non-threaded articles: Cotters and cotter-pins
- [7318.29](https://border.bot/hs-codes/731829) Non-threaded articles: Other

## How it is structured

7318.16 is a six-digit subheading. Its first two digits, 73, are the chapter; the first four, 7318, are heading 73.18; the last two, 16, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 73: Articles of iron or steel
- Heading 73.18: Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel
- Within the heading: Threaded articles
- Subheading 7318.16: Nuts

## In other countries

National tariff lines under 7318.16 are live on border.bot for the United States (5 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/731816): 5 lines, used by 1 other country

- Previous subheading: [7318.15](https://border.bot/hs-codes/731815) Threaded articles: Other screws and bolts, whether or not with their nuts or washers
- Next subheading: [7318.19](https://border.bot/hs-codes/731819) Threaded articles: Other

## Frequently asked questions

### What does HS code 7318.16 cover?

HS code 7318.16 covers threaded articles, nuts.

### Which heading and chapter is HS code 7318.16 in?

HS code 7318.16 is in heading 73.18 (screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel) in chapter 73 (articles of iron or steel).

### Where are goods of heading 73.18 classified when 7318.16 doesn’t fit?

Other goods of heading 73.18 are classified under 7318.11 (threaded articles, coach screws), 7318.12 (threaded articles, other wood screws), 7318.13 (threaded articles, screw hooks and screw rings), 7318.14 (threaded articles, self-tapping screws) or 7 others.

### Which countries’ tariffs list national lines under HS code 7318.16?

National tariff lines under 7318.16 are live on border.bot for the United States (5 lines, also used by 1 other country).

## Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 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.

Machine-readable: https://border.bot/hs-codes/731816.json