Honeywell - 24" thermocouple, 30 mV, with 11/32-32 male connector. The Q340A1074/U senses the pilot flame on gas-fired heating systems. The pilot flame heats the tip of the thermocouple, producing a temperature differential between it and the base to generate a small amount of DC power, measured in millivolts. It features a push-in clip, split nut, and adapter assembly for easy pilot burner installation. Spade or quick-connect terminals available for millivolt gas control connections. Male nut connector for Pilotstat® safety control power units.