Bleed Nipple Size - 8mm?

[dswarwick]

I want to change all of mine before I suffer another sheared off bleed nipple that effectively wrecks a caliper.

I can't remember the size - is it M6 or M8?

 

[f0xy]

I think the thread is M6, and the head is 8mm (spanner size for bleeding), dont quote me on that though. I can check later if no one else confirms it

 

[Munson]

I'm pretty sure I used an 8mm ring spanner when I changed my hoses and fluid recently. That would be an M6 thread but I have no idea how they're sold.