Does anyone know more details about the the two 4.6 mm screws securing the internal battery to the frame?
I have a refurbished t480 with no internal battery, so to install one I will need to also get hold of suitable screws.

I'm assuming 4.6 mm is the length, how about pitch or gauge? Or are they M# something or another style where all that is standardised?
Or any idea where I could look for a part number?