Rear Sock Remote lock out grub screw, help!!

[Sidmouth]

My cable has snapped, I tried to loosen the screw, looks like a 1.5mm but seems the thread, internal is stripped, it is such a tiny screw, anyone have a work around to get this screw out?

 

[Sidmouth]

Thanks To Stoked for the solution, an Imperial sized 1/16 does the job perfectly