The Square Headed Plug is installed in the radiator coolant tank to close designated openings and secure the cooling system. It prevents coolant from leaking out of the tank, helping maintain the required coolant level for proper heat transfer. It supports stable internal pressure within the cooling system, which is necessary for efficient temperature control. It allows secure closing of service or drain points while still enabling removal when maintenance is required.Attributes:• Prevents air from entering the coolant tank.• Supports reliable sealing during continuous operation.• Helps maintain consistent coolant circulation.Applications: The Square Headed Plug is located on the radiator coolant tank where it seals designated openings to prevent coolant leakage, maintain internal pressure, and protect the cooling system from contamination.