What is one advantage of using Hi-Lok fasteners in aircraft structures?

Hi-Lok fasteners are specifically designed with a unique locking mechanism that prevents them from being over-torqued during installation. This characteristic is critical in aviation applications, where precise torque specifications are essential to ensure that structural integrity is maintained. Over-torquing can lead to material fatigue or failure, which poses significant safety risks in aircraft. By utilizing Hi-Lok fasteners, technicians can trust that the fastener will secure components effectively without the added risk of damaging the surrounding structure, thereby enhancing the overall reliability of the assembly.

In contrast, while the other options present valid characteristics that can be beneficial in fasteners, they do not specifically highlight the unique advantages of Hi-Lok fasteners. For instance, cost efficiency and lightweight design are important factors to consider in fastener selection but do not directly pertain to the unique feature of preventing over-torquing. Similarly, corrosion resistance is a general property in many fasteners but does not encapsulate the key benefit provided by the Hi-Lok design, which is its reliable and secure fastening capability without risking improper torque application.