4016.93.10.10 - O-Rings

This HTS category specifically covers O-rings that are intended for use in automotive goods falling under Chapter 87 of the Harmonized Tariff Schedule. O-rings are continuous rings, typically toroidal in shape, made from vulcanized rubber. Their primary function is to act as a mechanical seal, preventing leakage between two mating parts, often in fluid or gas systems. The key classification criterion here is their specific application within vehicles, machinery, or equipment classified in Chapter 87.

Distinguishing this category from its siblings, O-rings are differentiated from "Oil seals" (4016.93.10.20), which are designed to prevent the ingress of contaminants or the leakage of lubricants. While both are seals, oil seals typically incorporate additional features like garter springs for enhanced sealing force. The "Other" category (4016.93.10.50) at this level would encompass gaskets, washers, and other seals of vulcanized rubber not specifically defined as O-rings or oil seals for automotive applications.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification within 4016.93.10.10 is definitive for O-rings whose end-use is exclusively within automotive goods, such as those found in engines, transmissions, hydraulic systems, and fuel lines of vehicles. This specificity ensures accurate tariff application based on the intended application of the rubber sealing component.