What screw is for a N scale Northern 4-8-4?

[Gmet13]

Hello, I am needing a replacement screw for a Bachmann N scale Northern 4-8-4. Does anyone know which screw this is? I can't find a part number. It's the screw that goes through the smoke stack to hold the shell on.

[rich1998]

No idea but it is going to be Metric. Everything comes from the other side of the Pond.

Rich