4007.00.00.00 - Vulcanized rubber thread and cord

This HTS category, 4007.00.00.00, specifically classifies vulcanized rubber thread and cord. These are products derived from natural or synthetic rubber that have undergone a vulcanization process, which improves their strength, elasticity, and durability. The form of thread or cord indicates a filament-like or string-like construction, typically used for binding, elastic applications, or as components in other manufactured goods.

Within the broader Chapter 40, which covers rubber and articles thereof, this heading distinguishes itself from other categories based on the specific form and processing of the rubber. Unlike raw rubber materials (Chapter 40.01-40.03), or unvulcanized rubber preparations (Chapter 40.05), or articles of unhardened rubber (Chapter 40.17), 4007.00.00.00 is for vulcanized rubber *in the form of thread or cord*. It is also distinct from finished rubber articles such as tires (Chapter 40.11) or footwear components (Chapter 64).

As a leaf node within the HTS structure, 4007.00.00.00 does not have further subdivisions. Classification under this heading relies on confirming that the product is indeed vulcanized rubber and is presented in a thread or cord form. Examples include elastic threads used in textiles, shock-absorbing cords, or rubberized cords for industrial applications. The key is the combination of vulcanized rubber material and its specific filamentous configuration.