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Co2 thread size help

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Co2 thread size help

Unread postAuthor: Acdcmonkey1991 » Thu Mar 13, 2008 7:34 am

I would like to know what size threads Co2 tanks have. I have looked all over but I couldnt find the size, I know they aren't standard NSFT or whatever ftting. Thanks for the help.
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Unread postAuthor: grumpy » Thu Mar 13, 2008 8:15 am

co2 tanks for paintball use 5/8-18UNF-2B threads, if you are talking about the co2 tanks for beer kegs such as a 5lb or 10lb tank, they use 1.125-12UNF-2B threads.
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Unread postAuthor: Acdcmonkey1991 » Thu Mar 13, 2008 9:01 am

Thank you for the help, but where could I get these? I already checked mcmaster.
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Unread postAuthor: grumpy » Thu Mar 13, 2008 9:15 am

what fittings are you looking for and for wich tank?
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Unread postAuthor: Acdcmonkey1991 » Thu Mar 13, 2008 9:25 am

I am looking for an adapter that goes from 5/8-18 UNF to 1/2 in NPT does anyone sell these?
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Unread postAuthor: psycix » Thu Mar 13, 2008 4:52 pm

You want to hook up CO2 directly that way?
Dont forget the regulator!!!!
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Unread postAuthor: D_Hall » Thu Mar 13, 2008 8:20 pm

psycix wrote:You want to hook up CO2 directly that way?
Dont forget the regulator!!!!


What he said.

Seriously, assuming you aren't building a very high pressure system, the easiest way to do what you want is to just buy a CO2 regulator. It'll have the threads you want on both the front and the back (well, typically it'll have 1/8" NPT, but you can go up easy enough).
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Unread postAuthor: Acdcmonkey1991 » Sat Mar 15, 2008 8:20 am

what I'm trying to do is use an open fitting and use the check valve on the co2 tank as a hammer valve for the gun.
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Unread postAuthor: Jared Haehnel » Sat Mar 15, 2008 8:52 am

Funny I asked the same question earlier and all I got was...we know but we aren't telling.....

Your dealing with a lot of pressure in one of those Co2 tanks you might want to do as they suggest and get a decent CO2 regulator and play it on the safe side.
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