The upper control arm ball joint pinch bolt on the popular Audi A/S 4, 5, 6, and 7 models is frequently corroded and must be cut out when removing or replacing the upper arms. This bolt & nut replacement kit has 720 hour saltspray certified coating to minimize future corrosion. Order one kit per side. Replace Audi bolt N10425302 and nut N10286110 with this kit.