Whats this screw in the bed doing?

Saw this screw and wanted to know if anyone knew what its purpose was and whether it could be used to attach a tie down to.

I know I could just unscrew it to see what happens but figured it would be easier to see if anyone here knew.

Thanks in advance.

EDIT: inserted image from attachment here.

 

holds something look under the bed to see what

 

Oh Crap don't touch that screw the bed will fall off, jk Idk my 03 has the same one.

 

i'm sure you can unscrew it and put a D-ring on with no problems, but i don't know how strong that d-ring point will be. Looks to be a pretty small screw from the picture. I don't have a 1st gen though, so i can't get a good image of size in my mind.

 

that's an awfully small screw for a d-ring.... i wouldn't trust it with more than about 25#.

 

pretty sure that holds the bed together.

 

its a turret mount screw, It is used to hold down a 50 cal machine gun