I jsut recived my thermocouples and they already have a threaded fitting on the end. THe problem is the thread is way to small i need to get up to 1/2 in or 3/8 if i have to. I spent a an hour in the hardware store yesterday trying every threaded brass fitting but couldn't find anything that fits. The thread is a 1/4-28 NF (i dont kow what that means, i think that the compression stuff fits on it but im not sure. Can anyone help my get this installed in my system?