ORB Port Blanking Plugs - Stainless Steel

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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 reusable 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, using a straight UNF thread for retention and an O-ring for the fluid seal.
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.
Reusable Port Closure

Provides a removable solution for closing an unused ORB port during maintenance, modification or permanent installation.

ORB vs AN/JIC

ORB and AN/JIC connections can share the same UNF thread dimensions but use different sealing methods. ORB seals with an O-ring against the port, while AN/JIC seals on a 37° flare. Always identify the connection type rather than selecting a plug by thread size alone.

Plug 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: Male ORB For installation into a compatible female O-Ring Boss port
Thread Type: Straight UNF Thread provides retention rather than the fluid seal
Sealing Method: O-Ring Seals against a compatible ORB port
Reusable: Yes Provided the threads, sealing surfaces and O-ring remain undamaged

Available stainless steel ORB port blanking plug size
Product Code	ORB Size	Thread
PLG-PRT-ORB-SS-ORB3	-3 ORB	3/8"-24 UNF

Check the connection type before ordering. -3 ORB and AN3 share a 3/8"-24 UNF thread but use different sealing methods. This plug is designed for an O-ring sealed ORB port, not a 37° AN/JIC flare connection.

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 ORB size is available?
This stainless steel version is available in -3 ORB, which uses a 3/8"-24 UNF thread.
How does an ORB port blanking plug seal?
An ORB connection uses a straight thread for retention while the fluid seal is created by an O-ring against the mating port.
Is -3 ORB the same as AN3?
No. -3 ORB and AN3 use the same 3/8"-24 UNF thread size, but they use different sealing methods. ORB seals with an O-ring, while AN/JIC seals on a 37° flare.
Do ORB blanking plugs require thread sealant?
No. The straight UNF thread provides retention rather than the fluid seal, so thread sealant or PTFE tape should not be required on a correctly matched ORB connection.
What are the blanking plugs made from?
They are precision CNC machined from 303/304 stainless steel for excellent strength, durability and corrosion resistance.
Where are these blanking plugs manufactured?
They are precision CNC machined in the United Kingdom.
What finish do the stainless steel plugs have?
They have a natural stainless steel finish, providing corrosion resistance without an additional coating.
Are ORB port blanking plugs reusable?
Yes, provided the threads, sealing surfaces and O-ring remain in good condition. Inspect the O-ring before reuse and replace it if damaged or deteriorated.