So far emphasis was laid on the type of material and the type of inserts used on them. But equally important are the mating components that are used in joining the two. Inserts are mainly made in the material or product to perform the function of holding pressure by protecting the material from the force. In such cases it is very crucial to make proper holes of correct diameters. This diameter has to be a little larger than the Tappex threaded insert so that it can hold the screw tightly and steadily thereby creating a proper hold without making way for loosened threads.