9209.91.40.00 - Tuning pins

This HTS classification, 9209.91.40.00, specifically covers "Tuning pins" which are essential components for pianos. These pins are the small, threaded metal pegs that are inserted into the pinblock of a piano. When a piano tuner turns these pins with a tuning hammer, they adjust the tension of the piano strings, thereby setting the correct musical pitch. The classification focuses on the physical characteristics and precise function of these tuning pins in the mechanism of pianos.

Within the broader category of "Parts and accessories for pianos" (9209.91), tuning pins are distinguished from the sibling category 9209.91.80.00, which encompasses "Other" piano parts and accessories. While this sibling category would cover a wide range of items like piano strings, hammers, dampers, pedals, or even decorative elements, 9209.91.40.00 is narrowly defined to include only the specific hardware used for tuning. The primary differentiator is the direct role in pitch adjustment.

As this is a leaf node in the HTS classification, there are no further subcategories under 9209.91.40.00. Therefore, the focus remains on clearly defining the scope of tuning pins themselves. Classification would rely on the item being a threaded metal pin designed for use in a piano's tuning mechanism, distinguishing it from general metal fasteners or other piano components.