Abstract: A fastener comprises an adjustable insert that disposed in a receptacle having a first end facing a grommet and the insert is connected to the receptacle for movement relative to the receptacle. The insert has a central opening and diametrically opposed cam and locking surfaces open to said central opening. A bore in the insert is radially disposed relative to a longitudinal axis of the insert. An engagement member disposed within the bore is moveable therein laterally relative to the longitudinal axis of the insert toward and against the receptacle to fix the insert against movement relative to the receptacle. The engagement member is moveable laterally relative to and toward the central opening of the insert to allow movement of the insert relative to the receptacle.