Part number 3831934 Nuts were used in 1 place on the 1966 and 1967 Corvette at the center of the grille. Nothing like the original was available until now. These exact reproduction u-nuts are visible when installed on the car! These are new reproductions of the original part. There has been no correct reproduction of these nuts, just a generic version u-nut that has a hex steel nut instead of the square nut like the original. Judges look for these! Get those extra points! Note the "M" logo on each nut.