The Parker Hannifin 76728 Coaxial Thermocouple provides reliable flame sensing to support the safe operation of compatible commercial gas equipment. Designed with 11/32"-32 threads and a 48-inch length, this replacement thermocouple detects the pilot flame and generates a small electrical signal that keeps the gas safety valve open during normal operation. If the pilot flame is exting... Parker Hannifin 76728 Coaxial Thermocouple W/ 11/32"-32 Threads 48"