2000 Dakota Bolt Problem

Hi i Bought a new bed and seat's For my 2000 Dodge dakota Club Cab
And now Bolts came with it i don't have any Bolts Does anyone know the standard size that they use for the bed and seats there are to different bolt sizes on the seat a biger bolt in the back and a smaller in the front But on the bed it is a big Bolt I Have no ideal what to use do not want to put the wrong bolt in and it fall out while going down the road Please Help Please Help




Thanks,
Dewey