Calipers and drums ABS cylinders Bleeder Nipple plug/Valve

[jacofito]

Hello everyone,

This is my first topic so understand please if I’m not in the right section to formulate my question.

I bought a second hand Yaris 2007 1.3 hatchback I already replaced the break pads and brake shoes, I was bleeding the system and I noticed one of the Bleeder Nipple plug/Valve However you know it was completely stocked and the wrench didn’t wor because is worn so I need to replace it this one in specific is located in the right front calliper. The question is what size or metric is it. I’ve been looking but is nothing exactly some people says is M6, M7 or M8.

I honestly want to buy the right one so that’s what I’m here may someone of you can tell me please which one I’ve to choose.

I really appreciate your help guys.