The original Aluminum nuts (bottom) have been superceded by 90179-06161....DO NOT USE these..the flange is too way small and will not cover the floor shield mounting holes.. When presented with these, I immediately climbed under a newer Lexus in showroom and ordered 90182-06007, which has large rotating flange. Painted them to avoid possibility of dissimilar metal corrosion. The Aluminum shields and nuts would have better durability had Toyota anodized...