7307.11.00 - Of nonmalleable cast iron

This HTS category, 7307.11.00, specifically addresses tube and pipe fittings made from nonmalleable cast iron. These fittings are essential components used to connect, redirect, or terminate iron or steel piping systems in various industrial, commercial, and domestic applications. Nonmalleable cast iron, characterized by its brittleness and inability to be deformed without fracture, distinguishes these fittings from those made from other forms of cast iron or steel.

The distinction between this category and its sibling, 7307.19 (Other cast fittings), lies in the specific material property of nonmalleable cast iron. While both fall under cast fittings, 7307.11.00 is exclusively for those manufactured from this particular type of brittle cast iron. This specificity is crucial for accurate tariff determination, as different material compositions can influence duty rates and import regulations.

Within this category, further subdivisions exist to refine classification based on the intended use and connection method of the fitting. The subcategories, such as those for threaded pipe connections, acknowledge that the design and function of cast iron fittings can vary significantly. Understanding these subcategories is key to precisely identifying the specific type of nonmalleable cast iron fitting being imported or exported, ensuring compliance with HTS classification requirements.