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ABC Permanent O-Ring


This permanent O-Ring is a great option when your regulator does not have a built-in o-ring. It screws into the CGA-320 Co2 tank valve and creates a good seal to help prevent air leaks what could arise in a metal on metal connection. It attaches directly to all Sherwood GV Series and Intermed cylinder valves, no drilling or tapping needed.

Warning WARNING: This product has Brass components. Brass alloys are known to contain trace amounts of Lead, which is known to the State of California to cause cancer and reproductive harm. For more information, go to

ABC Permanent O-Ring Reviews

Average Customer Rating:
(based on 1 reviews) 
My Problem is Finally Fixed
by:Paul (08-04-2014)
Winter Park, FL
Comments:Tried several things to correct a CO2 leak. This product has done trick.
Bottom Line:I would recommend this product.
what is the size of the Hex wrench do you need??
by Scoby doby Do on April 01, 2020
Hello, this permanent o-ring does not require any tools to install. You will be able to finger tighten it into the small hole on the C02 tank's valve.
by Dakota on August 20, 2020
Staff Answer
Can a hex wrench be used to snug this device?
by questioner on August 23, 2020
Yes it can!
by Nick on August 24, 2020
Staff Answer