20x Plastic Nuts for Audi A4 A8 Unthreaded 4mm Hole Engine Undertray Splashguard

 

These are used on A4 A8 for attaching wheel arch linings, splashguards and some bumper parts and trims. Once removed they are damaged and don't hold as tight and so are best to replace to avoid loosing them while on the road.

 

The hole diameter is 4mm and the collar diameter is 16mm