8413.91.20.00 - Of stock pumps imported for use with machines for making cellulosic pulp, paper or paperboard

This HTS classification, 8413.91.20.00, specifically covers parts for pumps that are imported for use in machinery dedicated to the production of cellulosic pulp, paper, or paperboard. These parts are integral components of pumps designed to handle the unique demands of processing these materials, which often involve slurries, fibrous substances, and corrosive agents. Examples of such parts could include impellers, casings, seals, or shafts specifically manufactured or adapted for this particular industrial application.

It is important to distinguish this classification from its siblings. HTS 8413.91.10.00 covers parts of fuel-injection pumps for compression-ignition engines, a distinct category focused on automotive and industrial engine components. The broader category 8413.91.90 "Other" would encompass any remaining parts of pumps not specifically enumerated elsewhere within the 8413.91 subheading. Therefore, 8413.91.20.00 is a highly specific designation for parts used exclusively in paper and pulp manufacturing machinery.

As this is a leaf node in the HTS classification system, there are no further subcategories. All eligible goods fall directly under this specific code based on their intended use with paper and pulp making machinery. Classification hinges on verifying the pump's intended application and ensuring the imported parts are designed for and will be utilized within that specific industrial context.