Patio Heaters & Room Space Heater Main Control Valve with Pilot M8*1 for 4mm tube， Please check below dimensions then order in avoid return Inlet Thread: Female M10*1 (0.394") Outlet Thread: 7/16”-24UNC Thread （0.429" ） Turn-ON Gas valve with 8mm Spindle Shaft Pilot Burner Connection Thread: M8*1 ( The valve is for low pressure only) .