5/8"-18 male to 1/4" NPT male/female?

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Old 08-20-19, 02:34 PM
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5/8"-18 male to 1/4" NPT male/female?

I need to purchase a two-stage regulator for a CO2 gas injection setup for a planted aquarium. I've found a couple on eBay, but the one I'm leaning towards has a 5/8"-18 female fitting on the regulator outlet. I'm having difficulty finding an adapter to convert to either male or female NPT. Does such a thing exist?
 
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Old 08-21-19, 01:03 AM
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Check the McMaster Carr website, very easy to search and if it exists it will be listed!
 
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Old 08-21-19, 03:33 AM
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Good call Marq. Forgot about McMaster-Carr. I use to buy from them all the time back when I was a buyer for local companies. Do they still sell to individuals?
 
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Old 08-21-19, 05:11 AM
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I use McMaster frequently and am not seeing anything at the moment. I'll keep looking. In general, I get the impression that the 5/8-18 fitting is popular in the welding industry and is typically used to connect a hose., hence the downward orientation of the fitting in relationship to the regulator. Just a guess. I found another regulator that has a needle valve with 1/4" female NPT, so I may just go with that one.
 

Last edited by mossman; 08-21-19 at 06:30 AM.
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