The importance of using the correct specification OE parts like this 8mm Captive Washer
Nut can never be overstated.
The thread will be accurate and the steel will have the correct plated finish. In short, it would be unwise, to say the least, to use anything other than new OE parts.
A similar 8mm
Nut:
9407008080HE
Please make sure part numbers ordered are compatible with your model. Make sure you order all the parts required at the same time and save money by combining shipping costs.