True or False: The same bell die used for Hi-Loks should not be used for flush head rivets.

The correct answer is true. The reason for this is that bell dies are specifically optimized for the deformation characteristics and the material properties of Hi-Loks. Hi-Loks require a unique style of deformation that ensures proper seating and load distribution, which is tailored to the use of bell dies.

On the other hand, flush head rivets require a different type of die, as they are designed to create a smooth, flush surface without any protrusions. Using the same bell die for both types of fasteners can lead to improper installation, potentially compromising the structural integrity and performance of the assembly. It is crucial to use the correct tooling to align with the specific application and requirements of each fastener type.

Thus, the distinction between the types of dies is a critical aspect in aerospace assembly where precision and safety are paramount.