Features: Universal thermocouple with M6*0.75 Thread on head Longest wire length 410mm 6.3mm Flat terminal end Suitable for gas Patio heater Open valve time less than 10s Specifications: Length: 410mm including two nuts Head Thread: M6 x 0.75 End connection:M8 x 1 Terminal size:6.3mm flat Usage: This thermocouple is used for outdoor gas patio heater. .