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Proper usage of sealing washers guarantees a tight connection of the self-drilling screw with the fixed metal plate.
The screw should be tightened so that the washer reduces half of its height. Too weak or too strong tightening will cause leakages.
Screw too slightly tightened.
A leakage in the central part of the connection may occur - at the tap screw thread.
A leakage in the central part of the connection may occur - at the tap screw thread.
Screw too strongly tightened.
A considerable deformation of the washer will occur, so that the edges will come of the base - thus not sealing the connection.
A considerable deformation of the washer will occur, so that the edges will come of the base - thus not sealing the connection.
