8411.99.90 - Other

This HTS category, 8411.99.90, encompasses "Other" parts for turbojets, turbopropellers, and other gas turbines, excluding those specifically defined elsewhere. It acts as a residual category for components that are not cast-iron parts requiring minimal processing (8411.99.10) and are not otherwise explicitly listed. The scope includes a wide array of components, such as specialized seals, fasteners, cooling vanes, and structural elements, that contribute to the overall function of gas turbines.

The key distinction from its sibling, 8411.99.10, lies in the level of processing and material. While 8411.99.10 is limited to rudimentary cast-iron parts, 8411.99.90 covers parts that may be made from various materials and have undergone more complex manufacturing processes, provided they don't fit into more specific subheadings. This category serves as a catch-all for turbine parts that do not meet the stringent criteria of other classifications within the 8411.99.90 range.

Further subdivisions exist within this "Other" category to delineate parts based on their application. Specifically, this heading differentiates between parts intended for aircraft gas turbines and those designated for non-aircraft gas turbines. This distinction is crucial for accurate classification and potentially for applying different duty rates or import regulations, reflecting the specialized nature and operational requirements of each type of gas turbine.