You are correct about the type of threads. I have never seen a faucet spray head with NPT threads, but I have seen various bastard-sized threads from Chinese faucets. For the most part, though, they are the same and most will thread onto your existing hose. The tricky part is finding a head that fits properly into the spout. Those sizes vary widely. Looking at your picture tells me you dont have to worry about that, though, because the hose connection is what is going to connect your head to the spout.
2016 Rockwood Windjammer 3029W Diamond
2015 Chevy 3500HD LTZ 6.0 Crew Cab 4x4 Long Bed 4.10:1 SRW