Cast Iron Small Washer is a type of washer made from cast iron, a strong and durable material known for its high compressive strength and resistance to wear and corrosion. The washer is a thin, flat, circular disc with a hole in the center that is used to distribute a load of a fastener, such as a bolt or a screw, over a larger area. The washer can also be used to prevent damage to the surface of the material being fastened. Cast iron small washers are commonly used in heavy-duty applications, such as in construction, machinery, and automotive industries, where strength and durability are critical.