8207.40.30.00 - With cutting part containing by weight over 0.2 percent of chromium, molybdenum, or tungsten or over 0.1 percent of vanadium

This HTS category, 8207.40.30.00, specifically covers interchangeable tools designed for tapping or threading operations, whether used with hand tools or machine tools. The defining characteristic of this classification is the composition of the cutting part of the tool. It must contain by weight over 0.2 percent of chromium, molybdenum, or tungsten, or over 0.1 percent of vanadium. This particular alloy composition indicates tools designed for enhanced durability and cutting performance, often employed in more demanding applications or with harder materials.

This category is distinct from its sibling, 8207.40.60.00, which encompasses "Other" tools for tapping or threading. The sibling category would include tools for these operations that do not meet the specific alloy content criteria outlined in 8207.40.30.00. Therefore, the presence of the specified alloying elements is the key differentiator for this classification.

As this is a leaf node within the HTS, there are no further subcategories. Classification decisions within this heading are therefore primarily determined by the functional purpose of the tool (tapping or threading) and the precise metallic composition of its cutting element as stipulated in the description.