HS code for screws & bolts

HS code

7318.15

US tariff lines

US general duty

Free – 8.5%

Source: USITC Harmonized Tariff Schedule, Revision 21 (2026), effective 10/09/2026 · checked 2026-10-28

Threaded screws and bolts of iron or steel, with or without nuts, are 7318.15.

US tariff lines under 7318.15

US HTS code	Description	General duty
7318.15.20	Bolts and bolts and their nuts or washers entered or exported in the same shipment 11 statistical suffixes (10-digit codes) 7318.15.20.10 — Having shanks or threads with a diameter of less than 6 mm 7318.15.20.20 — Having shanks or threads with a diameter of 6 mm or more › Track bolts 7318.15.20.30 — Having shanks or threads with a diameter of 6 mm or more › Structural bolts 7318.15.20.41 — Having shanks or threads with a diameter of 6 mm or more › Bent bolts › Right-angle anchor bolts 7318.15.20.46 — Having shanks or threads with a diameter of 6 mm or more › Bent bolts › Other 7318.15.20.51 — Having shanks or threads with a diameter of 6 mm or more › Other › With round heads › Of stainless steel 7318.15.20.55 — Having shanks or threads with a diameter of 6 mm or more › Other › With round heads › Other 7318.15.20.61 — Having shanks or threads with a diameter of 6 mm or more › Other › With hexagonal heads › Of stainless steel 7318.15.20.65 — Having shanks or threads with a diameter of 6 mm or more › Other › With hexagonal heads › Other 7318.15.20.91 — Having shanks or threads with a diameter of 6 mm or more › Other › Other › Of stainless steel 7318.15.20.95 — Having shanks or threads with a diameter of 6 mm or more › Other › Other › Other	Free
7318.15.40	Machine screws 9.5 mm or more in length and 3.2 mm or more in diameter (not including cap screws)	Free
7318.15.50	Studs 4 statistical suffixes (10-digit codes) 7318.15.50.30 — Of stainless steel 7318.15.50.51 — Other › Continuously threaded rod › Of alloy steel 7318.15.50.56 — Other › Continuously threaded rod › Other 7318.15.50.90 — Other › Other	Free
7318.15.60	Other › Having shanks or threads with a diameter of less than 6 mm 4 statistical suffixes (10-digit codes) 7318.15.60.10 — Socket screws › Of stainless steel 7318.15.60.40 — Socket screws › Other 7318.15.60.70 — Other › Of stainless steel 7318.15.60.80 — Other › Other	6.2%
7318.15.80	Other › Having shanks or threads with a diameter of 6 mm or more 8 statistical suffixes (10-digit codes) 7318.15.80.20 — Set screws 7318.15.80.30 — Other › Socket screws › Of stainless steel 7318.15.80.45 — Other › Socket screws › Other 7318.15.80.55 — Other › Other › With hexagonal heads › Of stainless steel 7318.15.80.66 — Other › Other › With hexagonal heads › Other › Cap screws 7318.15.80.69 — Other › Other › With hexagonal heads › Other › Other 7318.15.80.82 — Other › Other › Other › Of stainless steel 7318.15.80.85 — Other › Other › Other › Other	8.5%

Import duty on screws & bolts by country

Import into the US

Free – 8.5%

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Import into the UK

See commodity codes ›

Import into the EU

3.7%

See CN codes ›

Extra duties may apply

The general rate applies to most countries. Imports from some countries also pay additional duties under Chapter 99 of the HTS, such as Section 301 tariffs on many Chinese goods. Check the current measures for your country of origin before you order.

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Frequently asked questions

Q1What is the HS code for screws & bolts?

The international HS code for screws & bolts is 7318.15. Threaded screws and bolts of iron or steel, with or without nuts, are 7318.15.

Q2What is the US import duty on screws & bolts?

It depends on the exact line: 5 US tariff lines sit under 7318.15, with general rates of Free – 8.5%. The table on this page lists each one. Goods from some countries pay additional duties on top.

Q3What is the 10-digit HTS code for screws & bolts?

The first 8 digits set the duty; the last 2 are statistical and depend on details such as material or who the product is for. The full list of US codes under 7318.15 is in the table above.

Q4Is the HS code the same in every country?

The first 6 digits (7318.15) are the same in every country that uses the Harmonized System. The digits after that, and the duty rates, are set by each country.

Find another HS code

New to customs terms? Read what an HS code is and our guide on how to calculate landed cost.

Classification guidance only, not a binding ruling or customs advice. The right code depends on your product’s exact material, function and construction. For certainty, request a binding ruling from U.S. Customs and Border Protection or ask a licensed customs broker.