7307.99.10.00 - Of iron or nonalloy steel

This HTS category, 7307.99.10.00, covers fittings for tubes and pipes made from iron or nonalloy steel that are not machined, tooled, or otherwise processed after forging. These fittings are essential components used to connect, terminate, or change the direction of piping systems. The "other" designation at this level indicates they do not fall into more specific categories for fittings based on material or processing.

Distinguishing this category from its sibling, 7307.99.30.00, is crucial. While both are "other" fittings not processed after forging, this classification specifically applies to fittings manufactured from iron or nonalloy steel. The sibling category, conversely, is reserved for fittings made from alloy steel, excluding stainless steel. Therefore, the precise alloy composition of the base metal is the determining factor for classification between these two subheadings.

As this is a leaf node in the HTS, there are no further subcategories. Classification within 7307.99.10.00 will be based on the material being iron or nonalloy steel, and the condition of the fitting being in its as-forged state without subsequent mechanical or thermal modification beyond basic finishing. Examples could include simple forged couplings or flanges of plain carbon steel.