A dutchy for fastening to a frame, to secure at least one glass pane or panel against the frame, comprises opposed wings adjoined by at least one resilient web disposed substantially within a plane containing a line of flexure along which the at least one web bends. Each wing comprises at least an intermediate portion spaced from the frame, at least one foot for bearing against the glass pane, and at least one raised portion projecting forwardly beyond the front face of the web. A bearing surface for engagement by a fastener is disposed between the respective feet of the opposed wings. The raised portions of the wings are spaced apart along the line of flexure, such that when a force is applied to the bearing surface the web flexes elastically toward the frame, causing the opposed raised portions to move toward each other in proportion to the amount of the applied force.