Washers help distribute the shock load of nuts, bolts, screws, and other threaded fasteners, preventing them from becoming damaged or unscrewed during normal operations. These thin, usually disk-shaped plates come with holes in the middle that allow workers to install the fastener through them. Typically made of metal or plastic materials, washers’ outer diameters are usually twice the size of their inner diameters.
The three main types of washers include:
- Plain washers
- Spring washers
- Locking washers
Here, we describe in detail each washer type as well as some of its applications.