Quoted from j450n:I bought my P-ROC for a scratch build, I ordered it with out a backing plate.
Now I need to mount it.
Is it safe to use metal screws and standoffs ?
Or should I be using plastic ?
Assuming you're talking about a P3-ROC. You can use metal screws and standoffs, just make sure that your standoffs as well as screw heads aren't wider than the copper pads surrounding the mounting holes.
M3 screws should work just fine.
Welcome to the community!
-- Jimmy