Ceramic Twist-On Wire Connectors are made from high quality ceramics and have excellent electrical and heat resistant properties for use over plastic connectors. They have a maximum working temperature of 1000 degrees F (537 degrees C) and are specified for applications above 200 degrees F (93 degrees C). Typical uses include appliances, high powered lighting fixtures, ceiling fans, heaters, plastic extrusions/injection molding barrels and similar high-temperature applications.