GWS servo horn screws

Hello,
For the GWS S03T STD servo (product number: RB-Gws-05), does anyone know what a recommended screw goes with its servo horn? The holes are 60 thousandth inch (0.060") but I don’t know if servos use metric or inch screws. I checked hitec, futuba because they are compatible with these servos but there does not seem to be a definitive answer.

Thanks

Hmm, not sure. We have contacted the manufacturer to see if they can provide the information.