What is the purpose of the pulling stem in a cherryMAX fastener?

The pulling stem in a cherryMAX fastener is crucial for the installation process. Its primary purpose is to pull and secure the rivet during installation, ensuring that the rivet is properly seated and tightened within the assembly. When the installation tool is activated, it grips the pulling stem, which is then drawn back, causing the rivet's body to expand and fill the hole in the material being fastened. This pulls the rivet into the correct position, creating a strong and reliable connection.

The efficiency and effectiveness in securing the rivet are critical, especially in aerospace applications where structural integrity is paramount. The pulling mechanism not only ensures that the rivet is firmly anchored but also that the installation meets the required specifications for strength and durability. While other options may seem relevant, they do not accurately capture the fundamental role of the pulling stem during the installation of CherryMAX fasteners.