Replace or upgrade your analog built-in grill thermometer with the state-of-the-art, Maverick Pro Series digital thermocouple grill thermometer. The stem diameter on this thermometer model DGT-310 is: .310˝ x 2˝ length. DGT-310 is for grills with analog thermometer hole diameter .310” and greater. It is a threaded stem and is held in place with a wing nut.