The M04128 Key is designed for securing rotating parts, such as gears and pulleys, onto shafts within King packaging machinery. This essential component prevents slippage and ensures precise alignment, enabling stable and efficient power transmission in systems including tablet counting, liquid filling, cotton inserting, labelling, and capping machines. Built to endure demanding production environments, the M04128 Key enhances operational reliability, supports consistent machine performance, and contributes to the durability of King packaging equipment.