Sorry if the title is a bit confusing. All Im looking for are the dimensions ie: thread size/length of the bolt that subaru uses to bolt the exhaust hanger to the transmission.

The place that replaced my clutch lost the bolt and now the hanger is rattling against my trans. I want to replace the bolt but don't feel like driving the hour it takes to go to the dealership then waiting a week for them to ship it to driving back then paying 12 times what the bolt is worh.

Anybody know what the bolt size is? Thank you in advance.