HSN Code 6813 refers to "Friction material and articles thereof, e.g., sheets, rolls, strips, segments, discs, washers, pads, not mounted, for brakes, clutches or the like, with a basis of asbestos, other mineral substances or cellulose, whether or not combined with textile or other materials (excluding mounted friction material)." This classification code is essential for identifying friction materials and related items for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 6813 include brake pads, clutch discs, friction sheets, and washers. Additionally, the GST rate for friction materials under this code ensures accurate trade compliance.