Nut, Front Wheel Hub (Knuckle) Self-Locking 12.8mm (Genuine) EVO5-6

The MB573720 is a genuine Mitsubishi OEM Self-Locking 12.8mm nut used on  Lancer Evolution 5-6

This nut is notorious for developing heavy rust over time due to its exposed location underneath the vehicle, especially in wet or humid environments. A corroded nut can weaken structural clamping force, making removal difficult and potentially compromising the crossmember’s secure mounting.

Replacing rusty or seized crossmember nuts with genuine new hardware ensures proper torque retention, corrosion resistance, and safe vehicle operation.

• Part Number: MDB573720

• Compatibility: EVO5-6

• Material: OEM-grade steel with protective coating

• Common Issue: Prone to rust due to road exposure

• Manufacturer: Mitsubishi Genuine Part

Ideal to replace during suspension work, crossmember removal, or full restoration to maintain strength and reliability.