My kitchen sink has a sprayer. I want to remove it. I believe I would need a cap to seal off the connection after I take the sprayer hose off. I saw a few articles saying you need to get a "3/8-inch threaded brass flair cap". Is that correct? Picture below, was the best I could snap under there:
I want to go to a home supply store to get whatever cap I would need, but not sure what to ask them for.
The corrosion under there looks pretty gross.