Abstract: A quick-disconnect coupling which provides connection between a fuel source and a gas appliance. The quick-disconnect coupling is heat-sensitive for preventing the flow of gas to the gas appliance/equipment when it is subjected to high temperatures. This is accomplished by forming the ball bearings and/or the sleeve of a suitable thermally reactive material which melts or softens when subjected to high temperatures. Thus, if the melting point of the ball bearings and/or the sleeve is exceeded when the quick-disconnect coupling is connecting the fuel source to a nozzle, the heat will cause the thermally reactive material to soften, allowing the poppet spring to extend, pushing the poppet to seal against the flow of gas.