7318
4-digit headingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel
This is a 4-digit heading — a category, not a filing code. Pick the more specific code beneath it that best matches your goods; only a 10-digit statistical code can be used on a customs entry.
Duty rates
No rate is published at this level — check the specific 10-digit statistical code beneath it.
| Rate | Value and what it means |
|---|---|
| General rate (Column 1) | See 10-digit codeColumn 1 general Applies to most trading partners — the standard "normal trade relations" rate. |
| Special rate (Column 1) | —Trade programs The country letters in parentheses are free trade agreement and preference programs. If your goods qualify under one of them, that rate replaces the general rate. |
| Column 2 rate | —Non-NTR Reserved for the small group of countries that do not have normal trade relations with the US (currently Cuba, North Korea, Russia and Belarus). Almost no importer uses this column — if you are shipping from anywhere else, ignore it. |
| Unit of quantity | — How CBP expects the quantity to be reported on the entry summary. |
Codes within Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel
59 more specific lines fall under 7318.
- 7318.11.00.00Coach screws10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles:12.5%
- 7318.12.00.00Other wood screws10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles:12.5%
- 7318.13.00Screw hooks and screw rings8-digit subheadingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles:5.7%
- 7318.13.00.30Having shanks or threads with a diameter of less than 6 mm10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Screw hooks and screw rings
- 7318.13.00.60Having shanks or threads with a diameter of 6 mm or more10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Screw hooks and screw rings
- 7318.14Self-tapping screws6-digit headingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles:
- 7318.14.10Having shanks or threads with a diameter of less than 6 mm8-digit subheadingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Self-tapping screws:6.2%
- 7318.14.10.30Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Self-tapping screws: > Having shanks or threads with a diameter of less than 6 mm
- 7318.14.10.60Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Self-tapping screws: > Having shanks or threads with a diameter of less than 6 mm
- 7318.14.50Having shanks or threads with a diameter of 6 mm or more8-digit subheadingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Self-tapping screws:8.6%
- 7318.14.50.20Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Self-tapping screws: > Having shanks or threads with a diameter of 6 mm or more
- 7318.14.50.80Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Self-tapping screws: > Having shanks or threads with a diameter of 6 mm or more
- 7318.15Other screws and bolts, whether or not with their nuts or washers6-digit headingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles:
- 7318.15.20Bolts and bolts and their nuts or washers entered or exported in the same shipment8-digit subheadingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers:Free
- 7318.15.20.10Having shanks or threads with a diameter of less than 6 mm10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment
- 7318.15.20.20Track bolts10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more:
- 7318.15.20.30Structural bolts10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more:
- 7318.15.20.41Right-angle anchor bolts10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more: > Bent bolts:
- 7318.15.20.46Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more: > Bent bolts:
- 7318.15.20.51Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more: > Other: > With round heads:
- 7318.15.20.55Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more: > Other: > With round heads:
- 7318.15.20.61Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more: > Other: > With hexagonal heads:
- 7318.15.20.65Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more: > Other: > With hexagonal heads:
- 7318.15.20.91Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more: > Other: > Other:
- 7318.15.20.95Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Bolts and bolts and their nuts or washers entered or exported in the same shipment > Having shanks or threads with a diameter of 6 mm or more: > Other: > Other:
- 7318.15.40.00Machine screws 9.5 mm or more in length and 3.2 mm or more in diameter (not including cap screws)10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers:Free
- 7318.15.50Studs8-digit subheadingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers:Free
- 7318.15.50.30Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Studs
- 7318.15.50.51Of alloy steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Studs > Other: > Continuously threaded rod:
- 7318.15.50.56Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Studs > Other: > Continuously threaded rod:
- 7318.15.50.90Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Studs > Other:
- 7318.15.60Having shanks or threads with a diameter of less than 6 mm8-digit subheadingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other:6.2%
- 7318.15.60.10Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of less than 6 mm > Socket screws:
- 7318.15.60.40Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of less than 6 mm > Socket screws:
- 7318.15.60.70Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of less than 6 mm > Other:
- 7318.15.60.80Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of less than 6 mm > Other:
- 7318.15.80Having shanks or threads with a diameter of 6 mm or more8-digit subheadingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other:8.5%
- 7318.15.80.20Set screws10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of 6 mm or more
- 7318.15.80.30Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of 6 mm or more > Other: > Socket screws:
- 7318.15.80.45Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of 6 mm or more > Other: > Socket screws:
- 7318.15.80.55Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of 6 mm or more > Other: > Other: > With hexagonal heads:
- 7318.15.80.66Cap screws10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of 6 mm or more > Other: > Other: > With hexagonal heads: > Other:
- 7318.15.80.69Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of 6 mm or more > Other: > Other: > With hexagonal heads: > Other:
- 7318.15.80.82Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of 6 mm or more > Other: > Other: > Other:
- 7318.15.80.85Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Other: > Having shanks or threads with a diameter of 6 mm or more > Other: > Other: > Other:
- 7318.16.00Nuts8-digit subheadingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles:Free
- 7318.16.00.15Non-locking chrome-plated10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Nuts > Lugnuts:
- 7318.16.00.30Locking10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Nuts > Lugnuts:
- 7318.16.00.45Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Nuts > Lugnuts:
- 7318.16.00.60Of stainless steel10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Nuts > Other:
- 7318.16.00.85Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Nuts > Other:
- 7318.19.00.00Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles:5.7%
- 7318.21.00Spring washers and other lock washers8-digit subheadingScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Non-threaded articles:5.8%
- 7318.21.00.30Helical spring lock washers10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Non-threaded articles: > Spring washers and other lock washers
- 7318.21.00.90Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Non-threaded articles: > Spring washers and other lock washers
- 7318.22.00.00Other washers10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Non-threaded articles:Free
- 7318.23.00.00Rivets10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Non-threaded articles:Free
- 7318.24.00.00Cotters and cotter pins10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Non-threaded articles:3.8%
- 7318.29.00.00Other10-digit statistical codeScrews, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Non-threaded articles:2.8%
Chapter 73: Articles of Iron or Steel
Browse every code in this chapter to compare neighbouring classifications.
View Chapter 73Source: USITC Harmonized Tariff Schedule, 2026 Basic Edition, Revision 16. Rate text is reproduced verbatim from the official export; category paths and duty estimates are derived.
Data loaded August 18, 2026.Check this chapter on hts.usitc.govReport an error with this codeHow this data is built