This MS Washer is made from mild steel. Mild steel is a low-carbon steel that offers good strength and durability while remaining relatively inexpensive. This MS Washer is commonly used in a wide range of industrial and construction applications, where it provides a reliable and cost-effective solution for fastening and securing various components. This washer can also be coated with various materials such as zinc or galvanized to improve its corrosion resistance. It is easy to install and remove and a commonly used component in many fastening applications.