Mounting screws for Lyman R25 sight

[Dimrod]

I recently acquired aforementioned sight for my model 25 rifle. I don’t have the mounting screws. What screws do I need to attach it to the plugged holes in the rear of the receiver? Any leads on where to find two of these?

Thanks.

[usabaker]

Its going to either be a 6-48 NS or 8-40 threads. Brownells https://www.brownells.com/ will have them