loose tub spout

I'm new here. I'm reinstalling a Kohler tub spout that slips onto the copper pipe and has a hex screw to tighten. When I removed it I scored the pipe, making a pretty deep groove by twisting the faucet trying to get it off. Also, when it came off the white washer and black o-ring came off. Have I broken it? Water leaks at the wall. Any suggestions on how to make it water tight?

If you don't have the rubber seal, you may want to get a new "slip spout"

It may seal with the new o-ring, if not maybe some silicone will help with the seal.

spout

If you scored the tubing in the area where the "O" ring seals then you probably have ruined it and will need a screw on spout with a threaded adapter soldered to the tubing.

File and Sand

You can file out scratches if you haven't indented the pipe. You should be able to reassemble the o ring and white insert.