No it's a bored-through Swagelok fitting I machined and had welded into place. I run a K-type thermocouple up in there with teflon ferrules so I don't crush the thermocouple. Works great and has never leaked. I always know the temperature of the liquid, not the outside of the conical or the ambient atmosphere around the conical. You'd be surprised how much different the temps are from outside to inside.