All contacts (excluding M1 and M2) can be utilized as auxiliary contacts

Always verify compatibility with your specific furnace model number before installation

and single-gang boxes

Whether you are performing a furnace burner orifice replacement during a standard tune-up or restoring a unit after a conversion

the thread-in style and output range make it compatible with most major brands requiring an 11/32-32 connection

TB Woods 4JN Insert All contacts (excluding M1 andThe TB Woods 4JN Insert is a high performance Sure Flex Plus Neoprene solid sleeve designed for critical power transmission in size 4 coupling assemblies. Engineered with a one piece solid construction, this 4JN neoprene sleeve provides a balance of high torque capacity and exceptional flame and oil resistance. Built for versatility, it is 100% compatible with existing Sure Flex Plus flanges, allowing for straightforward retrofitting in industrial