A fastener for securing a rail to a wire shelf having a plurality of support rods extending in parallel spaced-apart fashion. The fastener has a fastener body with an elongate rail engaging flange, a shelf engaging flange, and a connecting shaft portion extending between the rail engaging flange and the shelf engaging flange. The rail engaging flange is insertable through an elongate opening of an the rail in a first orientation and, upon rotation of the fastener, the rail engaging flange is configured to extend across said elongate opening thereby restricting withdrawal therefrom, while the shelf engaging flange traps a support member of the shelf thereby interlocking the associated rail to the associated shelf.