8708.91.70.00 - Of cast iron

This HTS category, 8708.91.70.00, specifically classifies parts of radiators that are manufactured from cast iron. These parts are accessories designed for use with motor vehicles falling under headings 8701 through 8705. The primary function of these cast iron radiator parts is to facilitate heat exchange, thereby regulating the engine's operating temperature.

The distinction between this category and its sibling, 8708.91.75 (Other), lies in the material composition. While 8708.91.75 covers radiator parts made from materials other than cast iron (such as aluminum, copper, or plastic), this specific subcategory mandates that the part be composed of cast iron. Therefore, the determining factor for classification here is the material from which the radiator part is constructed.

As this is a leaf node within the HTS structure, there are no further subcategories. All cast iron radiator parts intended for use in vehicles classified under headings 8701 to 8705 will fall under this specific code, provided they are not covered by more specific provisions elsewhere in the tariff. Practical classification will rely on verifying the material of the radiator part and its intended use.