In a highly regulated industry such as the Aerospace it is impossible to have suppliers entering and leaving as they please. Entry barriers raise the importance of understanding the behavior of the entire supply chain system ranging from turbine engines to fasteners; any part can force the plane production to stop when there is a supply shortage. Nowadays, every purchasing order placed by Aerospace, from OEMs to high-tech suppliers, is followed thoroughly. In contrast, fasteners fall in the category of nuts and bolts for their “simplicity” and high volumes and often they are taken for granted. This paper focuses on the fastener supply chain, developing a system dynamic model to show insights of its behavior and to set the base for a further improvement analysis.