108 how big is the bolt for sealing the broken bridge aluminum window?

Bolts with a diameter of 6mm are suitable for windows or doors with the thickness of doors and windows below 60 mm. The specifications of expansion nails are: expansion nails for broken aluminum doors and windows are generally used for the installation of door and window frames. The spacing between the mounting screws of the door window frame is not more than 20 cm at the corner and not more than 60 cm in the middle. After determining the location of the broken aluminum window, we need to install expansion screws on the window. When we install, we should tie one every 50 cm, paying special attention to the screws nailed on both sides of the window, and at least two screws should be installed on each side.