Accessories / Copper push pins with compression springs BACK
The push pins, typically made of brass or plastic, have a flexible barb at the end that engages with a hole in the PCB; once installed, the barb retains the pin. The compression spring holds the assembly together and maintains contact between the heat sink and component. For larger heat sinks and higher preloads, push pins with compression springs are very effective. For mechanical attachment, copper push pins are more robust, surely having better long term reliability than plastic ones in many industrial applications.