Heat generation is a common phenomenon in various industrial systems. To manage this effectively, fins are widely employed to enhance heat dissipation through natural convection. Heat sinks made from different materials are integral components in applications such as heat exchangers, reciprocating compressors, internal combustion engines, electric motors, transformers, and other electronic devices. The material selection, dimensions, and geometry of the fins play a critical role in optimizing thermal performance. Recent studies have explored various fin geometries—including rectangular, triangular, circular, and notched configurations—to maximize heat transfer rates. This study presents an experimental investigation into natural convection heat transfer using aluminum cast V-shaped fins, both notched and unnotched. The results indicate that a fin configuration with notch size of 20 mm and 600 inclination yields the highest heat transfer coefficient and Nusselt number, demonstrating enhanced thermal performance under these conditions.