PLUG SEALING

A Plug Sealing (often called a sealing plug or sealing cap) is designed to close off a port or hole while ensuring no leakage of oil, fuel, coolant, or compressed air. It’s typically used:

• In engine blocks to seal off unused passages (e.g., oil or coolant galleries)

• In hydraulic systems to block off test ports or unused line connections

• In gearboxes or transmissions to seal fluid passages

Materials:

• Metal (aluminum, steel, brass) for high-pressure applications

• Rubber or plastic with O-rings for low to moderate pressure sealing