Proper screws for connecting spring retention plate to the bridge in Pre-Refined Flys

[caseyinakilt]

Hey guys, I could use a little help. I’m in the process of rehabbing a pre-refined Deluxe, and I’m curious if anybody knows what kind of screw was used to attach the spring retention plate to the base of the bridge?
Can I just use anything from the hardware store that fits, or is there something specific I need to find?