9902.15.99 - Plain shaft sputter bearings without housing (the foregoing other than spherical bearings), each weighing 200 g or more and with journal diameter measuring 117 mm or more (provided for in subheading 8483.30.80)

This HTS category, 9902.15.99, specifically addresses plain shaft sputter bearings that are not housed and are not spherical in nature. The classification is contingent upon two key physical attributes: the bearing must weigh 200 grams or more, and its journal diameter must measure 117 millimeters or more. These bearings are intended for use in applications falling under subheading 8483.30.80, indicating their role as parts of machinery for the transmission of motion.

Unlike other categories within Chapter 99, which often deal with temporary modifications or special restrictions related to various goods, this specific node is dedicated to a precise technical component. Its siblings would represent entirely different temporary provisions or restrictions, rather than comparable mechanical parts. The detailed specifications for weight and journal diameter serve to distinguish these particular bearings from smaller or lighter variants that might be classified elsewhere, ensuring accurate customs reporting.

As a leaf node, HTS 9902.15.99 does not contain further subdivisions. Therefore, its classification is definitive once the specified physical characteristics and intended application (as per subheading 8483.30.80) are met. Importers and exporters should carefully verify the weight and journal diameter of plain shaft sputter bearings to ensure correct classification under this provision, thereby adhering to the specific import requirements or duty rates associated with this temporary tariff item.