7307.11.00.30 - For threaded pipe

This classification encompasses pipe fittings crafted from iron or steel, specifically those produced through casting and characterized as nonmalleable cast iron. These fittings are designed for joining sections of pipe or for altering the direction or size of a pipeline. Examples include elbows, tees, couplings, and reducers made from cast iron that is not readily deformed under pressure or impact. The "nonmalleable" designation is critical, distinguishing these items from those made from malleable cast iron, which possesses greater ductility.

While the broader category covers all cast fittings of iron or steel, this specific node narrows the focus to nonmalleable cast iron. The sibling category, ": Other:", would typically encompass cast fittings made from materials other than nonmalleable cast iron, such as malleable cast iron or steel castings, or potentially fittings of a different manufacturing process if the parent category was structured differently. The distinguishing feature here is the material composition and its inherent properties as derived from the casting process.

As this classification represents a leaf node within the HTS, there are no further subcategories. The classification ends at this specific description, "For threaded pipe," indicating that these nonmalleable cast iron fittings are specifically manufactured with threads for connecting to threaded pipes. The inclusion of "For threaded pipe" serves as the final determinant for classification within this HTS code, differentiating them from similar nonmalleable cast iron fittings that might have flanged, plain, or other types of ends.