8421.29.00.40 - Hydraulic fluid power filters, rated at 1,000 kPa or greater

This HTS subcategory, 8421.29.00.40, specifically classifies hydraulic fluid power filters designed for use in systems operating at a pressure of 1,000 kilopascals (kPa) or greater. These filters are critical components in hydraulic systems, such as those found in heavy machinery, industrial equipment, and automotive applications, where they remove contaminants from hydraulic fluids to protect sensitive components and ensure efficient operation. The classification hinges on the filter's intended application within high-pressure hydraulic power systems.

While other "Other" subcategories within 8421.29.00 exist, such as 8421.29.00.65, this specific code is distinguished by its precise requirement for operation at elevated pressure thresholds. This pressure rating is a key determining factor, differentiating these specialized high-pressure filters from general-purpose liquid filters or those designed for lower-pressure hydraulic applications. The emphasis on the "1,000 kPa or greater" rating ensures that only filters meeting these stringent performance specifications are classified under this heading.

As this is a leaf node within the HTS structure, there are no further subcategories for this specific classification. Therefore, the focus for classification professionals is on accurately identifying products that meet the described function as a hydraulic fluid power filter and possess the specified high-pressure operational capability. Examples of goods that would fall under this classification include return line filters, pressure line filters, and suction strainers intended for use in demanding hydraulic circuits that operate at or above the 1,000 kPa threshold.