I recently purchased a set of ralley wheels from a well known Chevelle parts supplier. I soon learned that they do not include the bolts/screws that attach the center cap to the hub cap. It almost looks like it would require a self tapping bolt. Does anyone know the proper GM part number or a good sub part for these bolts? The hub cap PN # is 03901712 and the center cap is PN#3908762. Thanks in advance for any help.