9507.90.40.00 - Fishing casts or leaders

This HTS code, 9507.90.40.00, specifically classifies "Fishing casts or leaders." These are essential components of a fishing line, designed to connect the main fishing line to the hook or lure. A fishing cast, also known as a leader, is typically made of monofilament, fluorocarbon, or wire and is designed to be nearly invisible in the water or to provide abrasion resistance and strength at the point of greatest stress.

Distinguishing this category from its siblings, 9507.90.20.00 covers pre-packaged fishing lines intended for retail sale, while 9507.90.60.00 pertains to nets such as fish landing nets and butterfly nets. This category is distinct because it focuses solely on the connection piece between the main line and the terminal tackle, rather than the entire line, the net, or other types of tackle.

As a leaf node within the HTS, 9507.90.40.00 does not have further subcategories. Therefore, classification within this code relies on accurately identifying the item as a fishing cast or leader based on its function and typical construction, differentiating it from complete fishing lines or netting equipment.