The flat washers have been used extensively as bridges for gaps especially in cases where you find that a hole is much bigger that the screws or bolts that need to be fitted into it. They have therefore become very important in different kinds of applications especially commercially. They come in different materials and the selection one makes will depend on the application and the washer needs that he has for the application. You will find them in leather, wood, fabric and metals such as iron, copper, steel and bronze among many other options. There are also plastic, paper and rubber flat washers. The huge variety makes it possible to find a washer suitable for any kind of application.
One of the advantages that come with the flat washers is that they help in preventing corrosion especially between the two metals they have been used for. Most of the metal washer will go through pre heating to make them resistant to high temperatures. Other materials you will find include fiberglass, plastics reinforced with cotton and glass filled nylons. Nylon and plastic flat washers are the most popular especially with electronics industries and electrical industries. This is because in the settings, the hard wearing quality that they have comes in handy.
The plastic and nylon washers do not conduct any heat thus making them great options for insulation even between metal parts. It is also hard for these materials to catch fire especially in the case of the plastics making them perfect for the electrical industries. Threaded parts used together with the washer offer secure fastening and provide that great grip ensuring that nothing moves out of place. They will also provide resistance against corrosion, moisture and rust among other elements.