8409.91.92.10 - Connecting rods

This HTS category, 8409.91.92.10, specifically classifies connecting rods designed for use with spark-ignition internal combustion piston engines that are intended for marine propulsion. Connecting rods are critical components that link the pistons to the crankshaft, converting reciprocating motion into rotational motion. The key defining characteristic for inclusion in this subheading is their sole or principal intended application with engines used to power marine vessels.

This subheading is distinguished from its sibling, 8409.91.92.90, which covers "Other" connecting rods for spark-ignition engines. While 8409.91.92.10 is exclusively for marine engines, the "Other" category would encompass connecting rods for spark-ignition engines used in a broader range of applications, such as automotive, aircraft, or stationary power generation, provided they are not specifically covered elsewhere.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, classification under 8409.91.92.10 depends on a thorough confirmation that the connecting rods are intended for spark-ignition internal combustion piston engines and, crucially, that their primary purpose is for marine propulsion. This excludes connecting rods for diesel engines (heading 8408) or other types of engines not falling under headings 8407 or 8408.