Metric Port Blanking Plugs

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Metric Port Blanking Plugs – O-Ring Sealed Port Closures

Seal unused metric threaded ports with our aluminium Metric Port Blanking Plugs. Designed for compatible O-ring sealing ports, these compact plugs provide a neat and removable way to close redundant connections in oil, fuel, coolant and other fluid-system components.

Why Choose Our Metric Port Blanking Plugs?

O-Ring Sealing

The straight metric thread retains the plug while an O-ring provides the fluid seal against the mating port.
Low-Profile Internal Hex Design

An internal hex drive keeps the installed plug compact while allowing straightforward installation and removal with a suitable hex key.
Wide Range of Metric Threads

Available from M10 x 1.00 through to M22 x 1.5 to suit a range of compatible automotive and motorsport fluid-system components.
6061-T6 Aluminium Construction

Precision-machined from lightweight 6061-T6 aluminium and finished with black anodising for protection against wear and corrosion.
Reusable Port Closure

Ideal for temporarily or permanently closing unused ports while retaining the option to reopen the connection later.

What is a Metric Port Blanking Plug?

A metric port blanking plug screws into an unused female metric port to close the connection. These plugs use a straight metric thread for retention and an O-ring to create the fluid seal against the mating port.

Check the Port Before Ordering

Metric diameter alone does not determine compatibility. Check the thread diameter, thread pitch and sealing arrangement of the port before selecting a plug. These plugs are designed for compatible O-ring sealed metric ports.

Plug Type: Metric Port Blanking Plug For closing compatible unused female metric ports
Drive Type: Internal Hex Low-profile design for installation with a suitable hex key
Material: 6061-T6 Aluminium Lightweight, high-strength alloy
Finish: Black Anodised Protects against wear and corrosion

Connection: Male Metric For installation into a compatible female metric port
Thread Type: Straight Metric Thread provides retention rather than the fluid seal
Sealing Method: O-Ring Seals against the mating port using an O-ring
Reusable: Yes Reuse only if the plug, threads, sealing surfaces and O-ring are free from damage

Available metric port blanking plug sizes
Product Code	Metric Thread
PLG-PRT-MET-AL-M10X100	M10 x 1.00
PLG-PRT-MET-AL-M12X15	M12 x 1.5
PLG-PRT-MET-AL-M14X15	M14 x 1.5
PLG-PRT-MET-AL-M16X15	M16 x 1.5
PLG-PRT-MET-AL-M18X15	M18 x 1.5
PLG-PRT-MET-AL-M22X15	M22 x 1.5

Check the port before ordering. The metric thread diameter, thread pitch and O-ring sealing arrangement must all be compatible.

Oil Systems
Fuel Systems
Coolant Systems
Sensor Ports
Manifolds
Unused Metric Ports

Free repair or replacement for two years from the date of purchase. Learn more

Frequently Asked Questions

What are metric port blanking plugs used for?
They are used to close unused or redundant female metric ports in compatible fluid-system components such as adapters, manifolds, filter housings, cooler components and sensor blocks.
What metric thread sizes are available?
The range includes M10 x 1.00, M12 x 1.5, M14 x 1.5, M16 x 1.5, M18 x 1.5 and M22 x 1.5.
How do metric port blanking plugs seal?
These plugs use a straight metric thread for retention and an O-ring to create the fluid seal against a compatible mating port.
Do I need thread sealant or PTFE tape?
No. These metric port plugs are designed to seal using an O-ring rather than the threads, so thread sealant or PTFE tape should not be required when installed into the correct mating port.
How are the plugs installed?
The plugs feature an internal hex drive and are installed using a correctly sized hex key. Ensure the thread, sealing surfaces and O-ring are clean and undamaged before installation.
Are metric port blanking plugs reusable?
Yes, provided the plug, threads, sealing surfaces and O-ring remain free from damage. Inspect the O-ring before reuse and replace it if it is damaged or deteriorated.
Are metric and ORB port plugs interchangeable?
No. Although both may use straight threads and O-ring sealing, the thread standards and dimensions are different. Always match the plug to the exact thread and port specification.