7307.19 - Other:

This category, HTS Code 7307.19, encompasses "Other" fittings of iron or steel that are cast but do not fall under the specific definition of "nonmalleable cast iron" fittings found in the sibling category 7307.11. These fittings are designed for joining or connecting pipes and tubes made of iron or steel. They are characterized by their manufacturing process of casting, meaning they are formed by pouring molten metal into a mold.

Distinct from 7307.11, which specifically addresses fittings made from nonmalleable cast iron, this subheading is for cast iron fittings where the iron exhibits different properties or is otherwise not classified as nonmalleable. The key differentiator lies in the metallurgical characteristics and intended applications of the cast material.

The subcategories within 7307.19 further refine the classification based on specific types of cast iron fittings. HTS Code 7307.19.30 covers "Ductile fittings," which are made from ductile cast iron, a material known for its enhanced strength and ductility compared to traditional cast iron. The remaining fittings within this broader "Other" category, which do not fit the ductile description, are classified under HTS Code 7307.19.90 as "Other." This hierarchical structure allows for precise identification and duty assessment based on the specific type and properties of the cast iron fitting.