A fastener for securing a first vehicle module to a second vehicle module includes a head having a substantially vertical capturing surface configured for releasably engaging a portion of the second vehicle module, a body having a base configured for attachment to a back of the first vehicle module and a neck extending between the base and the head. The neck includes at least one reinforcing rib structure. The head defines a hook portion including the capturing surface configured for releasably engaging a cooperating flange disposed on the second vehicle module. The hook portion further includes a cam surface configured for slidingly translating over the cooperating flange, the capturing surface and the cam surface meeting at an acute angle. In embodiments, the fastener is used to variably secure a vehicle grille assembly to a vehicle front end module bolster.