What documents are required to import HS 73181540 into United States?

Typically required: commercial invoice, packing list, bill of lading / airway bill, certificate of origin (for preferential rates). Confirm latest requirements with USITC Harmonized Tariff Schedule (HTS) 2026.

How to calculate landed cost for importing HS 73181540 into United States?

Use CIF (goods + freight + insurance) × Free = import duty. Then add VAT/GST for import-stage taxes. Treayo provides an online calculator at https://treayo.cn/en/calculator/us.

WCO classification path

Chapter73Articles of iron or steel
Heading7318Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel
Subheading731815Other screws and bolts, whether or not with their nuts or washers
National73181540Machine screws 9.5 mm or more in length and 3.2 mm or more in diameter (not including cap screws)

73181540

ACTIVE

What is the United States import tariff for HS 73181540 (Machine screws 9.5 mm or more in length and 3.2 mm)?

Quick answer: United States MFN rate for HS 73181540 is Free.

"Machine screws 9.5 mm or more in length and 3.2 mm or more in diameter (not including cap screws)"

HS code 7318.15.40.00 (Chapter 73 "Articles of iron or steel"; Heading 7318 "Screws, bolts, nuts, coach-screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel"; Subheading 731815 "Other screws and bolts, whether or not with their nuts or washers") under the United States tariff schedule classifies "Machine screws 9.5 mm or more in length and 3.2 mm or more in diameter (not including cap screws)". United States customs apply MFN rate of Free, Column 2 rate 2.2¢/kg. Statutory unit of measure: kg.

Tariff Schedule

Classification	Rate	Legal
最惠国税率 (MFN) MFN rate	Free	Official tariff schedule
第二栏税率 Column 2 rate	2.2¢/kg	Official tariff schedule

⚠️ U.S. additional tariffs (on top of base rate)

This product may fall under Section 232 national-security tariffs (steel/aluminum/copper 50%, autos 25%, semiconductors 25%, lumber 10%, all origins, incl. derivative lists). Goods covered by §232 are exempt from §122 but owe §232 instead. No authoritative machine-readable per-code source exists, so §232 is NOT included here — verify with CBP.

IEEPA tariffs (fentanyl/reciprocal) were struck down by the U.S. Supreme Court and ceased in Feb 2026. Verified Jun 2026.

Calculate landed cost for HS 73181540

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