One aspect according to the present invention includes a base portion and a clamp portion. The base portion can be joined to a first member of a vehicle. The clamp portion is formed integrally with the base portion and can joined to a second member of the vehicle. The clamp portion includes a first jaw and a second jaw defining a receiving space therebetween. The receiving space can receive a part of the second member. A support portion is formed on one of the first and second jaws and is positioned within the receiving space. The support portion is resiliently deformable and can apply a pressing force against the part of the second member in a direction toward the other of the first and second jaws during and after insertion of the part of the second member into the receiving space.