Vauxhall / Opel Unthreaded Plastic Nuts. Once removed they never hold as tight and so are best to replace.
10x Saab Plastic Nuts- Unthreaded 4mm diameter hole- Bumpers & wheel arch lining
10x Audi Plastic Nuts- Unthreaded 4mm diameter hole Engine Undertray Splashguard
10x Plastic Nuts Unthreaded Engine Wheel Arch Cover Undertray Splashguards clips
10x Vauxhall Corsa C Wheel Arch Trim Clips Fasteners for exterior plastic trims
10x Vauxhall Bumper & Splash Guard Plastic Rivet Body Panel Retaining Trim Clips
10x 5mm Plastic Rivet Clips for Trims, Wheel Arch Liner/Lining & Moudlings P/N - 51-16-1-881-149, 51161881149, 51160154946, 51-16-0-154-946
