Oil Cooler Leak (Crush Washer)
 

So my oil cooler is leaking from the front banjo bolt where the lines connect to the front of the engine. I was wondering does anyone know the size of the copper crush washers that go between the banjo bolt and the oil cooler hose? I've tried searching but I couldn't find anything about its size. The best I've found is that I could get them either from the dealer or NAPA and that they may be M18 something.