7307.99.50.15 - Nipples

This HTS classification covers "nipples," which are short lengths of pipe threaded at each end, typically used to connect two pipes or a pipe to a fitting. Within the broader category of tube or pipe fittings of iron or steel, this specific subheading is dedicated to nipples that are not otherwise specified within more detailed subdivisions. These items are generally characterized by their simple construction and primary function of joining threaded piping systems.

At this level, the "Other" designation signifies that these nipples do not fall under more specific subheadings based on material composition or specific type of connection beyond the general definition of a nipple. It is important to distinguish these from other "Other" categories, as further refinement in the HTS may exist at different levels of detail. For instance, if there were a subheading for "galvanized nipples" or "stainless steel nipples," this classification would exclude those.

As this is a leaf node, there are no further subcategories under HTS code 7307.99.50.15. Therefore, the classification is final for nipples fitting this description. Classification relies on the item being a nipple made of iron or non-alloy steel, and not specifically covered by any preceding or sibling subheadings that might apply to specialized types or materials.