Abstract: A method for making a plastic, relatively flexible stringer for a slide fastener is disclosed. The stringer blank is extruded in a relatively rigid U-shaped form and, subsequently, a plurality of longitudinally spaced, transverse slots are die cut in the stringer blank in order to provide a series of transverse, substantially parallel ladder-like portions wherein each of the ladder-like portions includes an interlocking head member. A plurality of longitudinally spaced apart seats are also formed by a die cutting step in order to define neck portions of reduced thickness about which the stitches are placed in order to secure the fabric to the stringer.