Cat® Retaining Rings are installed into machined grooves in housings/bores (internal) or on shafts (external) and are engineered for strength and longevity in a variety of applications. Cat® Retaining Rings are manufactured to precise specifications and are built for durability, reliability and productivity. 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.Application:Cat® Retaining Rings are connected to a shaft or housing groove to retain a component. Consult your owner's manual or contact your local Cat® Dealer for more information.