1993 idler pulley bolt size

[ldhill99]

I was driving today and blew the idler pulley off (and the serpentine belt). I bought a replacement pulley but it didn't come with a bolt and they couldn't give me any ideas on what size the bolt should be. Help!

 

[jason's 94]

sorry think i have a different one in mine.

 

[walterd140]

2 different sizes, 10mm & ??? maybe 8mm?? I forget the other, been a while since I did mine. I had to order from the dealer as it is not at part stores