7307.92.30.30 - Of alloy steel (except stainless steel)

This HTS category, 7307.92.30.30, specifically classifies sleeves, also known as couplings, that are made from iron or steel, are threaded, and are manufactured from alloy steel, excluding stainless steel. These fittings are designed to join pipes or tubes, providing a secure and often sealed connection. Their threaded nature allows for easy assembly and disassembly, making them suitable for various plumbing, industrial, and mechanical applications where pipework is prevalent.

Distinction from its sibling, 7307.92.30.10, lies solely in the material composition. While the sibling covers sleeves made of iron or nonalloy steel, this classification is reserved for those manufactured from alloy steel, which implies the addition of elements like chromium, molybdenum, or nickel to enhance properties such as strength, hardness, or corrosion resistance, beyond those typically found in plain carbon steel.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Therefore, accurate classification under this heading hinges on confirming the threaded design of the sleeve/coupling and verifying that the material is indeed alloy steel, specifically excluding stainless steel varieties. Examples within this category would include threaded couplings for oil pipelines, high-pressure steam systems, or hydraulic lines where the enhanced properties of alloy steel are beneficial.