9902.15.98 - New crankshafts designed for use solely or principally with compression-ignition internal combustion piston engines of a cylinder capacity exceeding 19,000 cc, such crankshafts measuring 200 cm or more but not over 900 cm in length, 100 cm or more but not over 200 cm in width and 50 cm or more but not over 200 cm in height (provided for in subheading 8483.10.30), the foregoing except such new crankshafts of forged steel, other than for vehicles of chapter 87, each measuring more than 1.86 m in length and weighing 453 kg or more

This HTS category, 9902.15.98, specifically addresses new crankshafts designated for use in compression-ignition internal combustion piston engines with a cylinder capacity exceeding 19,000 cc. The classification is further refined by precise physical dimensions: a length between 200 cm and 900 cm, a width between 100 cm and 200 cm, and a height between 50 cm and 200 cm. These crankshafts must also not be of forged steel, other than for vehicles of chapter 87, and must measure less than 1.86 meters in length and weigh less than 453 kg. The primary purpose of these crankshafts is for heavy-duty industrial or marine engine applications.

As this node resides within Chapter 99, it represents a temporary tariff provision, modification, or restriction. Unlike the primary HTS chapters (01-98) which classify goods based on their inherent nature and function, Chapter 99 headings are dynamic and often reflect policy-driven adjustments to trade. Therefore, this specific crankshaft classification should be understood as a special provision, likely temporary, that modifies the standard tariff treatment for crankshafts that would otherwise fall under a heading like 8483.10.30. Its existence signifies a targeted import policy affecting these particular large, heavy-duty crankshafts.

Given that 9902.15.98 is a leaf node, there are no further subcategories within this specific HTS code. This means that any new crankshaft meeting all the detailed criteria of description, cylinder capacity, physical dimensions, material exception, and weight/length specifications will be classified directly under this heading without further subdivision. The detailed requirements serve as the sole determinants for inclusion in this classification, highlighting the specificity of this temporary trade measure.