Where used: 6 captive screws that secure the heat sink to the system board for use only with HP
Compaq 6530s Notebook PC models (screws are secured to the heat sink by C-clips)
Where used: 4 captive screws that secure the heat sink to the system board for use only with HP
Compaq 6531s Notebook PC models (screws are secured to the heat sink by C-clips)
Phillips PM2.5×10.0 captive screw 129