1323.V3 Radiator Drain Cap For 3008 1323V3 Sealing Plug, Coolant Thermostat Flange Radiator drain cap designed for use with compatible engine cooling systems.Functions as a sealing plug for the coolant thermostat flange.secure closure of the radiator drain point to maintain system integrity during.Constructed to fit specific model applications requiring the 1323V3 configuration.Provides performance in maintaining coolant containment within the system.Disclaimer of Affiliation: This is an aftermarket component.Brand and model mentions are for illustrative compatibility only.