Internal Routing Port - Screw Size

gustybh
gustybh Posts: 16
edited February 2019 in Workshop
First thing, I’ve been an idiot. When replacing the cables on my Bianchi Sempre Pro 2015 I’ve lost the small screw that attaches the internal routing port to the downtube.
Does anyone have any idea what size screw this would be? All I know is it’s very small & lost somewhere in the back garden.