What is this "clamp" on the prop governor...?

In checking out the engine compartment, I saw this silver colored clamp on the end of the prop governor:



You are looking down on the governor.

What is it's function? Nothing seems to be attached to it.

Also, it's on there very solidly but there doesn't seem to be a lock washer and the head of the screw has a hole in it...probably for safety wiring. But there is no flange or place to run a safety wire except around the screw/nut assembly.

What is this part? What is it's function? And how would one go about safety wiring it?

Thanks!

Looks like a Flange Clamp. They are commonly used to hold a flange for a seal or bearing assembly, but I have not seen one on a governor.
The screw is a Filister Head. A common safety method would be to route the safety wire around the bolt through the opening of the clamp under the bolt.