Offered with a head, Barbed Pins were created specifically for use in plastic assemblies. The raised barbs are angled backwards, opposite the direction of insertion for maximum retention. All Barbed Pins are provided with a generous pilot to facilitate alignment with the hole and ease installation. Barbs are recommended for use in flexible plastics where optimum resistance to axial force is desired. After installation, the plastic will backfill into the area around the barbs resulting in maximum retention. Barbs are not appropriate for brittle plastics or those containing high percentages of fillers. As barbs are a radial feature, they do not resist rotation of two components relative to one another. For this requirement, a straight or helical knurl should be used.