ORB Port Blanking Plugs - Stainless Steel

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£2.20

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ORB Port Blanking Plugs - Stainless Steel

Seal unused O-Ring Boss fluid ports with our ORB Port Blanking Plugs - Stainless Steel. Precision CNC machined in the United Kingdom from 303/304 stainless steel, these plugs are designed specifically for compatible ORB ports where the fluid seal is made by an O-ring rather than the thread itself.

Why Choose Our Stainless Steel ORB Port Blanking Plugs?

ORB Port Connection

Designed specifically for O-Ring Boss ports, with the supplied O-ring sealing against the mating port.
303/304 Stainless Steel

Offers excellent strength and durability for demanding automotive and motorsport applications.
Natural Stainless Steel Finish

The corrosion-resistant natural finish requires no additional coating and provides a clean, durable appearance.
Precision CNC Machined in the UK

Manufactured in the United Kingdom for accurate thread form, consistent dimensions and reliable fitment.

ORB and AN Are Different Connections

-3 ORB and AN3 share the same 3/8"-24 UNF thread dimensions but use different sealing arrangements. ORB seals using an O-ring against the mating port, while AN seals on a 37° flare. Always identify the connection system rather than selecting a plug by thread size alone.

Type: ORB Port Blanking Plug For closing unused female O-Ring Boss ports
Material: 303/304 Stainless Steel Excellent strength and durability
Finish: Natural Stainless Steel Corrosion-resistant
Manufactured In: United Kingdom Precision CNC machined

Connection 1: ORB Male Seals against the mating port using the supplied O-ring

Available stainless steel ORB port blanking plug option
Product Code	Connection 1
PLG-PRT-ORB-SS-ORB3	-3 ORB Male 3/8"-24 UNF · O-ring supplied

ORB and AN connections share the same threads but seal differently. These plugs are designed for O-ring sealed ORB ports and do not have a 37° AN flare.

Brake Systems
Clutch Systems
Fluid Components
Unused ORB Ports

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

Frequently Asked Questions

What are stainless steel ORB port blanking plugs used for?
They are used to close unused female O-Ring Boss ports in compatible fluid-system components.
What connection does this plug use?
This stainless steel version uses a -3 ORB male connection with a 3/8"-24 UNF thread.
How does an ORB port blanking plug seal?
The supplied O-ring creates the fluid seal against the mating ORB port. The threaded connection retains the plug rather than providing the fluid seal.
Is the O-ring included?
Yes. The plug is supplied with the sealing O-ring.
Is -3 ORB the same as AN3?
No. -3 ORB and AN3 use the same 3/8"-24 UNF thread dimensions but different sealing arrangements. ORB seals with an O-ring, while AN seals on a 37° flare.
Do ORB blanking plugs require thread sealant?
No. The fluid seal is provided by the O-ring, so thread sealant or PTFE tape should not be required when the plug is installed into the correct ORB port.
What is the blanking plug made from?
It is precision CNC machined from 303/304 stainless steel for excellent strength and durability.
Where is the blanking plug manufactured?
It is precision CNC machined in the United Kingdom.