When you need a thermocouple connector that can tolerate the highest of temperatures or be used in a vacuum environment, these are the connectors you want!  Ceramic connectors can be easily baked out to eliminate moisture and unwanted volatiles.  And where plastic connectors would have melted, these connectors will survive the harshest of environments. 

• Molded from high quality ceramic, stable to 1472° Fahrenheit or 800° Celsius
• Miniature male connections are made from the same material as J-Type thermocouple wire
• Positive terminal: Iron | Negative terminal: Constantan
• White ceramic shell with black identifying dot indicating "Type J"
• Compatible with Watlow, Omega and other Industry Standard Mini Style Connectors
• Works well with high vacuum applications