I have a double-bowl, stainless steel kitchen sink mounted to a granite countertop, with a faucet with a pull-out spray head (pictured).
The faucet is no longer tightly mounted, so it wobbles back and forth. I'd like to tighten it. Unfortunately, it's not obvious to me how to tighten it. Here's a picture of the underside:
There aren't any obvious screws. All I can guess is that the nut around that brass threaded pipe is how to tighten it? Is tightening that the right way to go? And do you think I can get it tight enough just with that? Or should I expect to have to do something extra (plumber's putty?)?