Description:Lock rings, like 351-0300, are a type of retaining ring used in machine grooves of housings/bores (internal) or 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.Attributes:• Steel lock ring with no split• Angle: 43°• Inside Diameter: 1394.4 mm (54.90 mm)Application:Consult your owner’s manual or contact your local Cat Dealer for more information.