8477.20.00.45 - 6.4 cm or greater

This HTS classification pertains to single-screw extruders designed for processing thermoplastics, specifically those with a screw diameter measuring 6.4 cm or greater. These machines are integral to the plastics manufacturing industry, utilizing a rotating screw within a heated barrel to melt and homogenize thermoplastic materials, which are then forced through a die to form continuous profiles, sheets, or other shapes.

This category is distinguished from its sibling, HTS 8477.20.00.35, by the physical dimension of the extruder's screw. While both cover single-screw extruders for thermoplastics, this classification specifically applies to those with a screw diameter of 6.4 cm or larger, indicating a capacity for larger-scale or higher-volume production compared to their smaller-screw counterparts.

As this is a leaf node within the HTS structure, there are no further subcategories. Classification at this level is determined solely by the type of extruder (single-screw), its application (processing thermoplastics), and the critical physical characteristic of the screw diameter being 6.4 cm or greater. This specific criterion ensures accurate duty assessment and trade statistics for this particular size and type of machinery.