oil cooler thread size?

I have leaky oil cooler lines. Im ordering the JHM block fittings, I already have 10 feet of -12 hose and a handfull of fittings I will only need to buy maybe one of the fittings. The part that has me stumped is the metric thread size on the oil cooler. I was going to call and ask JHM when I order the block fittings, but I doubt they would want to give that up since it keeps me from spending double to get their whole kit. If anyone can chime in with the size that would be awesome. Its a small leak now, but I dont want to chance anything.