Auveco AVC13933 0.5 in. Head Nylon Grille Nut – No.8 or No.10 Screw Size. AUVECO NYLON GRILLE NUT #8 OR #10 SCREW SIZE 1/2 HEAD. Auveco products provide OE fit and function. Engineered with durability and ease of use in mind it ensures efficiency and long-lasting results for both professionals and hobbyists.Features.