Need the exact factory part for your Hyundai or Kia repair? This is the genuine OEM castle nut, part number 49551-21000 (also listed as 4955121000). It comes in the original manufacturer's retail packaging, which means it's the identical part you would buy at the dealership. Using a genuine OEM nut ensures perfect thread fit, proper torque specification, and guaranteed compatibility for critical suspension or steering components (often used on tie rod ends, ball joints, etc.). Don't risk a cheap aftermarket part that might strip or fail – for a small but vital fastener like this, going OEM is the smart move. Always confirm this part number matches the one you're replacing on your specific vehicle model.
