Plain washers, also known as flat washers, are simple and versatile mechanical components used in various applications. These washers are typically circular in shape with a hole in the center, allowing them to be placed between a nut or bolt head and the surface it is being tightened against. The main purpose of plain washers is to distribute the load evenly over a larger area, preventing damage to the surface and providing stability. They are commonly made from materials such as steel, stainless steel, or nylon, and come in different sizes and thicknesses to accommodate different fastener sizes. Plain washers are essential in industries like construction, automotive, and manufacturing, where they play a crucial role in ensuring the integrity and longevity of assembled structures and components.