Abstract: An auto accessory rack adapted to be mounted on the rear deck, roof or other vehicle outer surface. The rack includes a generally rectangular frame from which extend, at the corners of the frame, shafts ending in convex ball portions. These ball portions are received by socket members in a snap-in relationship to form a ball and socket universal joint. The socket members, formed from non-metallic, resiliently deformable material, include a base portion adapted to rest on the vehicle outer surface. Outer brackets overlie the socket members and engage the ball portions to retain them in the socket members. Fasteners secure the outer bracket and socket members to the vehicle outer surface with the socket member bases insulating the brackets from the vehicle surface and providing a weathertight seal between the rack and the vehicle surface.