The Protorque Welch Plug Brass Cup 45mm (RBC45MM) is engineered to provide dependable sealing performance for automotive engine and cooling system applications. Featuring a durable brass cup construction, this welch plug is designed to seal large core holes in engine blocks and cylinder heads, helping to prevent coolant loss and protect critical engine components.

Manufactured to OE-style press-fit specifications, it offers precise fitment and long-lasting reliability. The corrosion-resistant brass material helps withstand coolant exposure and harsh operating conditions, making it ideal for engine rebuilds, repairs, and preventative maintenance.

Note: Sold per piece.

Part Number: RBC45MM