If you're after the thread size, it's M30x1.5
If it's the size of the nut across the flats it's 35mm or 1 3/8"
32 mate
200Nm
36mm
185 Nm
See the link here:
300Nm. Use new nut!
35mm
To fit a Peugeot 406 wheel bearing, start by safely lifting the vehicle and removing the wheel. Next, detach the brake caliper and rotor to access the hub assembly. Remove the hub nut and any retaining clips, then carefully extract the old bearing from the hub using a bearing puller if necessary. Finally, press the new bearing into place, reassemble the hub with the rotor and caliper, and ensure everything is securely tightened before replacing the wheel.
41mm
30mm
77mm
30mm