GEM system CHT spring probe #2852. Insight provides two CHT type of probes. Spring probes which screw into the cylinder head thermowell, and Gasket Probes which replaces the spark plug gasket. Gasket Probes are recommended for use anytime Spring Probes cannot be used
What is the thread size on the GEM System CHT Spring Probe #2852?
Per the manufacturer, The GEM System CHT Probe #2852 is 3/8 -24 Thread size.