There is provided a cable attachment for sealing and retaining cables entering an opening of a telecommunications closure. The cable attachment includes an adapter body with an opening through which the cable passes; and a grip device and grommet device are also located within the opening of the adapter body for strain relieving and sealing, respectively, the cable passing through the adapter body. The cable attachment further includes a bolt portion that is selectively moveable relative to the adapter body for applying a force to the grommet device for selectively creating a seal about an outer surface of the cable. Alternative designs for sealing and/or strain relieving cables entering a closure are provided.