Plain washers are simple, flat round disks designed to distribute the load of a threaded fastener, such as a bolt or nut. They are commonly used to prevent damage to the surface of the material being fastened, as well as to provide a smooth, level bearing surface. These washers are available in various materials, such as steel, stainless steel, and brass, and come in a range of sizes to accommodate different applications. Their straightforward design and versatile functionality make them an essential component in numerous construction, machinery, and automotive applications, ensuring the durability and stability of assembled materials.