Lost the screw that requires a hex key

[Medinat]

While installing the nest doorbell wired the small top screw that requires a hex key fell to the ground and is lost.  Where can I get a replacement, I did not see any in the google store.

[MplsCustomer]

@Medinat 

Google Nest does not sell spare parts.  You could try contacting Support for a replacement:

1. Go to https://support.google.com/googlenest/gethelp.
2. Select a category/product family, and type in a brief description of the issue, then click "Next".
3. Click "Other", then click "Next step".
4. Under "Resources", just click "Next step". (Clicking one of the listed links will bring up a Help page page.)
5. Under "Contact options", choose to get a phone call or chat with the team, depending on availability in your country.