Don't know how many I'll need but I have spares, I've stopped buying anything automotive on Amazon with the bad luck I've had lately with their crap parts.How many drain plugs do you need? Why not get Fumoto valve? Amazon.com: Fumoto Original F-106 with LC-10 Lever Clip F-Series Engine Oil Drain Valve, 1 Pack, Gold : Automotive
I brought back to life a 1995 Grand Cherokee 4.0L and the thermostat, clutch fan, radiator and radiator cap all failed within two weeks. They must either sell counterfeit parts or factory rejects. NEVER again. I replaced all of them local at NAPA after I returned them and got my money back. The NAPA parts were on average 25% more but guess what....they all work. I can see now why they sell so cheap because you get to invest twice the labor when they fail.
Sorry about the rant I'm still pissed off.