# Are ModalAI PCBs' mounting holes isolated?

Source: https://forum.modalai.com/topic/1015/are-modalai-pcbs-mounting-holes-isolated
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2022-06-13 23:17:24 UTC by hmlow
Replies: 2 · Views: 578

## hmlow · 2022-06-13 23:17:24 UTC

Hi devs

Would like to ask if the boards eg. VOXL, Flight Core, VOXL ESC, cellular modem add on etc have their mounting holes (inside) electrically isolated?

The holes are aligned perfectly and I intend to stack them up - just unsure if using a stainless steel screw through them would be safe and not cause a short from one board to another/all.

Thanks

## Reply by Sam Armstrong (ModalAI staff) · 2022-06-13 23:34:02 UTC

They are isolated, feel free to use conductive hardware!

## Reply by hmlow · 2022-06-14 00:42:52 UTC (in reply to Sam Armstrong)

@Sam-Armstrong awesome!