Plain washers, also known as flat washers, are simple yet essential components in various industrial and household applications. These thin, flat discs are typically circular in shape with a hole in the center, allowing them to be placed between a nut and a bolt or screw to distribute the load and prevent damage to the material being fastened. Plain washers are commonly made from materials such as stainless steel, brass, or nylon, offering different levels of strength and corrosion resistance depending on the specific requirements of the application. They provide a smooth surface for the nut or bolt to tighten against, reducing the risk of loosening over time. In addition to their functional role in distributing pressure, plain washers also help to protect the surface finish of the materials they are placed between, making them a versatile and indispensable component in the world of fastening and assembly processes.