Safety Set Screw Size?

[BigEvil]

My big meaty fingers keep dropping (and loosing into the abyss) the little set screws in the Intelliframe safety. Yeah, I take them apart to clean them, you would be surprised how much goo gets in there.

Does anyone know what the size of that set screw is?

Thanks for the assistance.

[Tunaman]

4-40

[BigEvil]

4-40