1. The fastener is inserted into a prepared hole of the proper thickness. The installation tool is placed over the exposed spindle and bears on the head of the fastener. The tool is actuated to begin the pulling action.
2. When the head of the spindle comes in contact with the end of the sleeve the blind head is begins to form by a bulbing action of the sleeve.
3. Continued pull of the spindle forms the bulbed blind head against the blind side material. When the spindle stop comes in contact with the sleeve counterbore the load builds up to signal the installation tool to shift driving the lock into the aligned spindle-sleeve cavities.
4. As the spindle load continues to build up the spindle separates leaving the installed fastener. The installation is complete and with a flush surface that often does not need shaving for aerodynamic surfaces.