Help identifying bolts and screws.

[golem]

Hello, I'm trying to find the specs of some missing screws on my bike, to replace them. With my poor English skills, I'm just not sure of the right terminology of those specific items. I wanted to know if anyone can give me the name of the pieces highlighted so I can do my research with the manual or if someone can simply give me the specs I'm looking for.
http://imgur.com/GYIVPt3
Top left is the bold that goes from the exhaust to the engine.
Bottom left is the bolt holding the fender struts.
and the right picture is the screw in the middle of the back fender, the one that holds the passenger seat.
Thank you for the help.