Cat® Sealing Washers are designed for specific applications based on size, strength, clamp load, and past performance. This is information other manufacturers do not have. They are selected to last until rebuild or the life of the machine. While it may seem as though non-Cat® hardware and fasteners are suitable for your machine, no other company knows your equipment like we do. Cat® washers s are manufactured to precise specifications and are built for durability, reliability & productivity. Cat® washers are designed to work together as a system for maximum clamping force.Application:Consult your owner's manual or contact your local Cat® Dealer for more information.