O-RING (Komatsu KO304-13-21391)

A damaged retaining ring can allow assembled components to separate under load, leading to mechanical failure. This aftermarket replacement part references the Komatsu catalog and cross-references part number KO304-13-21391. The retaining ring functions as a mechanical fastener that seats in a groove to secure a shaft or bore assembly. A worn or missing retaining ring may cause unintended disassembly of rotating or stationary parts during operation. Keeping a retaining ring in sound condition helps maintain axial positioning of components under normal working forces. This item ships at approximately 0.03 pounds. Verify the serial number or application, then call (562) 693-7748.

Part number variants: KO304-13-21391, ko304-13-21391, KO3041321391, ko3041321391