Can someone please let me know the size of this F-Bolt, part number 11513703?

 

You are probably going to have to give a description of the use of the bolt. I don't know who can tell you a size from a part number.

 

It's the bolt marked as #2 on the diagram, thanks for the diagram shbox. I believe it's the same size and type as the bolts that hold the rear seatbelts in place. Since I need to go out and buy the tool to loosen the bolt up, I would like to make sure I get the right size, thanks in advance.

 

You mean the size of the head? I don't remember. Just buy a set of torx sockets. You'll eventually need them anyway.