Nest 3rd Gen Base Unit T1/T2 Terminal Screw Size

[SteveBod]

Hello all!

I've managed to lose one of the T1/T2 terminal screws for the nest base unit (see photo below), can anyone advise the size please? I had to temporarily use a usb supply whilst renovating our hallway and went to reconnect to the permanent wiring but one terminal screw is missing! Hoping I don't have to buy a whole new base unit...! Thanks in advance for any help. Steve

 

[straitshooter]

Consider removing the other screw and visit your local hardware store.  They can likely find one to match. 

[OannaCG · Accepted solution]

Hi there @SteveBod! Please see below the measurements:

Screws measurements 

3.5 mm in diameter 

13 mm in length [including the head] 

Phillips Screw Top Fine thread

[SteveBod]

Thank you so much!

[AlexD]

Thank you for the input @straitshooter , much appreciated. Make sure to let us know if anything else comes up @SteveBod , I will go ahead and close this thread. Also, it would be best to take the other screw out when going to get a replacement, just to have it as a comparison like @straitshooter mentioned. 

[straitshooter]

If actually a metric screw ( likely), it’s an M3.5 X 0.60 pitch, length accordingly.  The nearest English equivalent would be a number 6-40 (40 being threads per inch), length overall of 1/2” nominally.