MS Plain Washer – Simple, Strong, and Reliable Fastening MS Plain Washers are flat, circular washers made of mild steel (MS), designed to distribute the load of bolts, screws, and nuts evenly, preventing surface damage and reducing the risk of fastener loosening. They are a basic yet essential component in bolted assemblies. Manufactured from high-quality mild steel, MS Plain Washers offer strength, durability, and cost-effectiveness. They are widely used in construction, machinery, automotive, electrical assemblies, and structural applications.