what does the top bolt for the brake caliper look like, im talking about how theres 2 bolts that holds the caliper on, the top 1. that bolts missing on 1 of my calipers and now that i have put smaller rims on my car the caliper moves when i go slow down and its grinding away at my caliper and the inside of my rim, im thinking about going down to the hardware store and getting a bolt for now to put into it but dont know the size length or if this is even a option help would be great thanks

 

fixed to a bolt from a ek caliper