O-RING (Hyundai HN303-15)

HN303-15: A damaged retaining ring can allow assembled components to separate under load, leading to mechanical failure. This aftermarket replacement part references Hyundai as the OE maker and cross-references part number HN303-15. The retaining ring functions as a mechanical fastener that seats in a groove to secure parts on a shaft or inside a bore. A common failure consequence is that a worn or missing ring permits axial movement, which can cause misalignment or disengagement of adjacent parts. During routine service, a retaining ring may be found cracked or deformed from repeated stress cycles. Verify the serial number or application, then call (562) 693-7748. No specific material qualifiers or specs are listed for this item.

Part number variants: HN303-15, hn303-15, HN30315, hn30315