The Cat BM997409 is a genuine OEM shim designed for precise adjustment and spacing in Caterpillar heavy equipment. This shim measures 0.127 mm (0.005 inches) in thickness, with an inside diameter of 50.8 mm (2.00 inches) and an outside diameter of 63.5 mm (2.50 inches). It ensures proper component alignment and reduces wear in critical assemblies across a wide range of Cat articulated trucks, asphalt pavers, backhoe loaders, compact wheel loaders, excavators, motor graders, off-highway trucks, pipelayers, scrapers, soil compactors, telehandlers, track loaders, track-type tractors, vibratory soil compactors, wheel dozers, wheel excavators, and wheel loaders.