PEM Heat sink mounting system securely attaches heat sinks to circuit boards while providing firm and constant contact to the chip component for optimum heat dissipation. System additionally integrates a unique audible ‘click’ feature to prevent over tightening during installation, accommodates slight expansion and contraction of joint components without causing stress or damage to delicate and expensive circuitry and allows for removal of the heat sink if necessary. Three-piece fastening system consists of Type HSCB captivating screw and Type HSL spring mated to Type HSR broaching receptacle nut or standoff. The screw and spring mount together permanently into the heat sink and the receptacle nut/standoff mounts permanently to the PC board.
