Obtain domestic harmonized tariff codes at HTC.USITC.gov or FindHTS.com. These websites allow you to find the appropriate code for products by searching for keywords in a product's name or description.
At HTC.USITC.gov, type keywords, such as "ball bearings," in the search box on the main page, and then click the Search button. Find the most applicable HTC code using stepwise refinement based on article descriptions. Domestic duty rates are also listed.
At FindHTS.com, type keywords in the Find HTS Codes Now box on the main page, and then click the Send button to display a list of related product headings and their associated descriptions. Click a heading on the left side of a listing to display subheadings, their descriptions and HTC codes.
The Harmonized Tariff Schedule is the U.S. International Trade Commission's implementation of the international Harmonized Commodity Description and Coding System, often called the Harmonized System, developed in 1988 by the World Customs Organization. This convention obligates member nations to use the Harmonized System nomenclature. As of 2015, more than 200 nations are members and each issues its own duty rates.
DutyCalculator.com provides HS codes and duties for more than 140 countries, including the United States. This website allows one free search for HS codes and then requires payment to conduct additional searches.