Contax MM screw size.

[nhodgkinson]

One of the screws on the mount of a Contax lens I have is damaged, partially striped. I did a little research and I think these are JIS screw though I don’t know for sure but the Contax is the MM version so produced in Japan so I’m wondering if anyone here has any experience with this and if they know whether they are JIS and if so what size they might be, the smallest size I can find on line is #000 but I’m not sure what actual size in mm this is.