6813.20.00.20 - Articles for use in civil aircraft:

This HTS code covers friction materials specifically designed for use in civil aircraft. These articles are essential components in braking and clutch systems of aircraft, and are characterized by their ability to generate friction when engaged. The materials typically include those with a basis of asbestos, other mineral substances, or cellulose, and may be combined with textile or other reinforcing materials. This subheading encompasses a broad range of such friction articles, including sheets, rolls, strips, segments, discs, washers, and pads that are not yet mounted onto a brake or clutch assembly.

It is important to distinguish this classification from its sibling, HTS Code 6813.20.00.25, also described as "Other." While both fall under the broader category of friction materials for aircraft not containing asbestos, 6813.20.00.20 specifically addresses those that *do* contain asbestos. This distinction is crucial for compliance, as materials containing asbestos are subject to specific regulations and may be treated differently during import.

As this is a leaf node in the HTS classification system, there are no further subcategories. Therefore, the focus for classification under 6813.20.00.20 lies on ensuring the article meets the criteria of being a friction material, intended for civil aircraft, and containing asbestos as a primary component or basis. The form of the friction material (e.g., sheet, disc) and whether it is mounted or unmounted are also key determinative factors.