Abstract: A grommet assembly for attachment to an apertured panel within a limited access space around the aperture for passing a wire bundle through the aperture. The grommet body includes a pivot support extending therefrom and offset to one side thereof when the grommet body is placed in an attachment position overlying the panel aperture. A peripheral stop flange of the grommet body engageable with one surface of the panel defines an attachement envelope within that limited access space. A retainer includes a pivot member by which the retainer is pivotally joined to the pivot support to rotate toward the grommet body. At an operative position, a stop portion of the retainer engages the other surface of the panel, and the retainer is sized so as to stay within the attachment envelopes it rotates. A locking means maintains the retainer in that operative position, thereby attaching the grommet assembly to the panel within the limited access space.