USA MM sterling backplate screws

I’m currently roadtripping in California and reminded myself to find a missing screw for my Musicman SUB Sterling bass (USA made) back plate cavity. I’ve seen on the musicman site that i can order them. I’m moving from place to place the coming week, so ordering online is not really an option.

Does anyone know what the dimensions/specs of the screws are? Maybe i can find them at a DIY shop or a musical instruments store?