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Pin Lock Thread question

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G-Hog

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Do all pin lock kegs post have the same thread size (both gas in and liquid out) or are they different depending on who made the kegs?

The reason I ask is because my wife brought home the 3 pin lock kegs I bought through a group buy yesterday, and 3 of the 6 fittings will not screw on to the post. I know there is nothing wrong with the post because I can thread 1 of the fittings that does work onto all the post on the other kegs. I've check the threads on the fittings that won't screw on and they are fine (not cross threaded or stripped).

The fittings were barely on the kegs when I took them out of the car. The only thing keeping them on was the o rings on the dip tubes.
 
According to this site, there are at least two different pin lock post thread types:

Cornelius R (pin lock)
Gas 19/32" - 18 (2-pin)
Liquid 19/32" - 18 (3-pin)

Firestone A, Firestone R, John Wood RA, John Wood RC (pin lock)
Gas 9/16" - 18 (2-pin)
Liquid 9/16" - 18 (3-pin)

Cheers!
 
I bet that's my problem. I wonder if there is any way to tell just by looking at the fittings.


Thanks for the help. :D
 

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