Ship & Customs · HS Chapter 36
HS codes, chapter 36.
The 3 four-digit headings of Harmonized System chapter 36, 3603 to 3606, as published in the US Harmonized Tariff Schedule. Each heading opens the free lookup with its ten-digit statistical lines, the Schedule B export numbers that share its first six digits, and the general duty rate on every line.
Catalog snapshot: August 23, 2026. Source: USITC Harmonized Tariff Schedule headings in the RevAddress tariff catalog.
| Heading | Covers |
|---|---|
| 3603 | Safety fuses; detonating cords; percussion or detonating caps; igniters; electric detonators |
| 3604 | Fireworks, signaling flares, rain rockets, fog signals and other pyrotechnic articles |
| 3606 | Ferrocerium and other pyrophoric alloys in all forms; articles of combustible materials as specified in note 2 to this chapter |
A four-digit heading is the family; customs forms want the full code. USPS customs forms take the ten-digit HTS number on outbound mail, and export filings take the Schedule B number. Open a heading in the lookupto pick the exact line, or search by what the product is in plain words.
Classifying more than one product?
The lookup is free with no daily cap. A whole catalog is one file: upload it and every SKU comes back with its HS heading, the ten-digit candidates, and the duty path, from $47.
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