Does anyone know what to call this connection. The hot water side to my faucet has a very small leak, sometimes, it will go days without a drop. I have removed the fitting from the faucet and reconnected it hoping that would fix it but if it doesn’t I don’t know what to ask for as far as the fitting is concerned. The first pic is sink connection. The 2nd is what I’m asking about. 2023 Paradigm 295MK. The shutoff does stop the leak.