New reproduction plastic screw clip also called spreader nut for Lancia Delta Integrale. This size of nuts fits into the small square recesses in the bodywork. This spreader nut can be used, among other things, for the screw points of the petrol pump and float covers in the interior.

Made of white plastic. 

Fits in a square recess of 7x7mm.

For reference, the OEM numbers of the gas pump covers and float protection that are screwed into the body by means of these plugs; 82424547 and 82424548.