Separable slide fastener

A separable slide fastener having a slider adapted to open and close the fastener and comprising a pair of stringer tapes each carrying a row of coupling elements in the form of a continuous, helically coiled filament along one longitudinal edge, each of said coupling elements including a pair of spaced legs supported on one of said tapes, a coupling head extending between said legs and connecting portions extending respectively from said legs remotely from said coupling head and connected to adjacent two of coupling elements, the coupling head of each coupling element having a pair of interengageable lateral projections extending longitudinally of the respective row of coupling elements beyond the width of the respective legs so that the rows of coupling elements can be interlocked in interdigitating relation by said lateral projections, and a separable terminal assembly comprising a separable pin fixed to the bottom end portion of one of said stringer tapes, a retainer pin fixed to the bottom end portion of the other stringer tape and a retainer formed integrally with said retainer pin for receiving therein said separable pin, the coupling heads of said endmost confronting pair of coupling elements having respective confronting flattened surfaces formed by removing said interengageable lateral projections thereof and positioned to allow said pair of coupling elements to have a limited relative movement capability facilitating the opening and closing action of the slider at said separable terminal assembly without mutual interference of said pair of coupling elements, said separable pin and said retainer pin being integral with said endmost coupling elements.