Co2/ASA Thread

[MFM-70]

Any one know the name/type of thread found on the Co2/HPA valves that screws into all ASAs in almost every marker?

ie the internal thread found in AGDs vertical bottle adaptor.

I think it is called a "G-(something)"

Thanks,

[Spider-TW]

CGA something...compressed gas association iirc

CGA 320 Thread
or
0.825-14NGO-RH-EXT

Explanation of the above.....

0.825" outside dia
14 Teeth Per Inch
RH Right Hand
EXT External
NGO... Acronym for
National Gas Outlet

http://www.teamonslaught.fsnet.co.uk/co2_info.htm

I've seen better data sheets somewhere...

None of that explains the pin depressor or o-ring seal area. Maybe that's why there are a lot of differences in asa's.

[MFM-70]

CGA something...compressed gas association iirc

CGA 320 Thread
or
0.825-14NGO-RH-EXT

Explanation of the above.....

0.825" outside dia
14 Teeth Per Inch
RH Right Hand
EXT External
NGO... Acronym for
National Gas Outlet

http://www.teamonslaught.fsnet.co.uk/co2_info.htm

I've seen better data sheets somewhere...

None of that explains the pin depressor or o-ring seal area. Maybe that's why there are a lot of differences in asa's.

Thanks for this.
I am looking to make some custom ASAs for family and the thread is my roadblock. The rest of the info I can reverse engineer form existing sources (o-ring seal, pin depressor etc.)
Regards,

[Spider-TW]

The pin depressor (if not a set screw) is generally about 0.07x, basically equal to one turn of the bottle threads. That length has to match up with where the o-ring seat area ends, so that it doesn't open the pin valve too much before the o-ring is seated. A little vent hole where the seat area ends is a nice feature that can help save o-rings.