Lost one screw for fixing doorbell to the corner kit

Hi there, when I installed my video door bell 3 plus to the corner kit, one of the screws was falling over and blown away, I've checked my spare kit but unfortunately the screw wasn't included. Just wondering by any chance I can know the spec/name for that type of screw or can I get it from the Ring shop? Please let me know, thank you so much. Sarphi