Is this a left hand thread thermocouple?
Answer Bob, No, we would not expect the thermocouple to have reversed threads. The connectors should be SAE threads, clockwise/right to tighten and counterclockwise/left to loosen. Just be very careful, brass fittings are pretty "soft" and can be cross threaded or damaged very easily.
What is the length of this thermocouple?
Answer Hello! Unfortunately, we do not have the length information available. I do apologize for the inconvenience. Thank you for your inquiry.