I have 2002 MCS what size mm is this bleeder valve screw for the rear caliper?

Thanks in advance, Munir

 

10 or 11 don't remember

 

Yes it's an 10mm thank you for your response. Let me rephrase the question what is the size of threads of the screw xx.xmm? I stripped the housing in caliber an need to fill it with the correct threads. I appreciate your response remix1041. here a bad pic.