8477.20.00.65 - With a screw size 6.4 cm or greater

This HTS category, 8477.20.00.65, encompasses extruders specifically designed for processing thermoplastics, which are characterized by having a screw size of 6.4 centimeters or greater. These machines are integral to manufacturing processes that shape molten plastics into continuous profiles, films, or other forms by forcing the material through a die. The "greater than or equal to 6.4 cm" screw size is a key physical characteristic used for distinguishing these particular extruders.

This classification is distinct from its sibling category, 8477.20.00.55, which covers extruders with a screw size measuring less than 6.4 centimeters. The size of the extruder's screw directly relates to its throughput capacity and the types of industrial applications it is suited for; larger screws generally indicate machines designed for higher volume or more demanding processing tasks. Therefore, the determination between these two categories hinges solely on this precise measurement of the screw diameter.

As this is a leaf node within the HTS structure, there are no further subcategories. Classification at this level is considered definitive, based on the defined scope and the specific physical attribute of the screw size.