These 3/8 x 1 x .05 flat washers are made of durable 18-8 stainless steel, providing excellent corrosion resistance and strength. They are designed to distribute the load of a fastener evenly over a surface, preventing damage to the material being fastened. These washers are ideal for a wide range of applications, including construction, automotive, and marine environments. Their flat design ensures a secure and flush fit, making them a reliable choice for various fastening needs.