Crossover Hardware

Anybody know off the top of there head what size the little bolts are on typical car audio crossovers? I have Image Dynamics crossovers and missing 1 little bolt. Ive wrote ID a email but wont expect anything back till Monday.

Ive tried different stuff on Google, eBay, Lowes and Ace Hardware. About a month ago there was a store on eBay that sold misc amp, car audio stuff and they sold the "most popular" size bolt used for crossovers that you could but in packs of 5, but what do you know..... tried looking last night for them and they're MIA.

 

Thanks Guys

 

Each crossover will be different. My Alpine SPX-177A's are insane where my Focals are rather basic. Can you post a pic?