Just a note that at least it is mentioned in the Zumo user’s guide in the assembly section:
“Note: There is a small chance the mounting tabs of the blade can cause shorts where it contacts the shield if the PCB solder mask is not thick enough, so we recommend adding some electrical tape or other insulating material between the blade and shield.”
HI,
Why not just use some nylon washers or even those RED card ones?? It just makes sense and is what I do by default when using metal screws on PCB’s Better still use nylon nuts & bolts…
Hope it helps.
Regards
Mel.
PS. Manufactures could help here by supplying the most suitable fittings in the first place…