does any one know what size the bolt is cause the nut came off and dont know the size

 

An 8 or 10mm.

 

For future reference and anyone searching 10mm 1.25 pitch

 

Umm as far as I know its the same size as the bolt to slacken the idler pulley belt which should be a 14mm. Definitely know for sure its not a 10mm.

 

He's giving the bolt size, which is the diameter of the threads on the bolt shank. That's 10mm. The thread pitch is 1.25 mm, measured from crest to crest. 14mm is the size of the wrench that fits the nut. Two different things, often confused.

 

Ahh I see. Good catch man. I read the thread to fast.