Many transmission lines have had hardware failures due to wind-induced vibrations. Over extended periods of time, the wind-driven rubbing between line insulator hardware and the associated cross arm attachment points can cause total failure of the cross arm at the point of attachment. These vibrations cause wear between the metal components on the transmission line hardware. In some cases, this could result in line failure or multiple arm replacements, which can be very expensive.
In many cases, over time, the clevis pin can completely erode through the attachment of the arm. If the hole is not repaired after it becomes worn, it may deteriorate to the point that it may no longer be able to support the weight of a conductor. In these situations, conventional methods may require replacing the entire arm.