Import duty / Chapter 73 / Heading 7318
Heading 7318 covers 12 tariff lines in LoadLoom's table; 10 of them clear duty-free under USMCA for goods made in Canada, the US or Mexico. Published US and Canadian rates below, verified October 2026. Pick the line that matches your goods for the worked example and border steps.
| HS code | Goods | US duty | Canada duty | USMCA |
|---|---|---|---|---|
| 7318.11 | Iron or steel; threaded coach screws | 12.5% | Free | Free with certificate |
| 7318.12 | Iron or steel; threaded wood screws other than coach screws | 12.5% | Free | Free with certificate |
| 7318.13 | Iron or steel; threaded screw hooks and screw rings | 5.7% | Free | Free with certificate |
| 7318.14 | Iron or steel; threaded self-tapping screws | 6.2% | Free | Not eligible |
| 7318.15 | Iron or steel; threaded screws and bolts n.e.c. in item no. 7318.1, whether or not with their nuts or washers | Free | Free | Not eligible |
| 7318.16 | Iron or steel; threaded nuts | Free | Free | Free with certificate |
| 7318.19 | Iron or steel; threaded screws, bolts and nuts n.e.c. in item no. 7318.1 | 5.7% | Free | Free with certificate |
| 7318.21 | Iron or steel; non-threaded spring washers and other lock washers | 5.8% | Free | Free with certificate |
| 7318.22 | Iron or steel; non-threaded washers, excluding spring and lock | Free | Free | Free with certificate |
| 7318.23 | Iron or steel; non-threaded rivets | Free | Free | Free with certificate |
| 7318.24 | Iron or steel; non-threaded cotters and cotter-pins | 3.8% | Free | Free with certificate |
| 7318.29 | Iron or steel; non-threaded articles, n.e.c. in item no. 7318.2 | 2.8% | Free | Free with certificate |
This page is a free reference for shippers, not a customs ruling. Final classification and duty are determined by the licensed customs broker at entry, and government amounts are always billed at actual. Rates change with each tariff edition and trade action.
