CGA-580 nitrogen / beer-gas cylinder valve (0.965"-14 NGO RH)
Where 0.965"-14 NGO RH is used, its real dimensions, and how to connect it to other keg fittings.
Published dimensions
- Designation
- 0.965"-14 NGO RH
- Size / thread
- 0.965"-14 NGO (National Gas Outlet), right hand, external
- Fitting form
- cylinder valve outlet nut, external
- Seals on
- nylon or fibre washer inside the nut against the valve outlet
- Rating / role
- the North American connection for nitrogen, argon and beer-gas (N2/CO2 mix) cylinders, up to 3000 psig
Used on: the outlet of nitrogen, argon and beer-gas cylinders used to pour nitro stout and to push beer without carbonating it; the nitrogen regulator inlet nut screws onto it.
CGA-580 is the nitrogen and beer-gas cousin of the CO2-only CGA-320. It is 0.965-14 NGO right hand, a larger thread than the 0.825-14 of CGA-320, so a CO2 regulator will not screw onto a nitrogen tank and the reverse is also blocked. Do not confuse it with the left-hand CGA-590, which is 0.965-14 NGO LH for other gases.
Flare fittings seal on the 45 degree flare face and must never be taped. Push-in fittings seal on an O-ring against the tube wall and need the tube cut square. Barbs seal under a worm clamp. Getting the sealing method right matters more than the thread label, because most homebrew leaks are a taped flare or an unclamped barb.
Connect this fitting
Sources: CONCOA CGA fitting reference chart (CGA-320.825-14 NGO RH, CGA-580.965-14 NGO RH, CGA-590 LH) ยท MoreBeer / Taprite dual-gauge nitrogen (beer-gas / argon) regulator: CGA-580 inlet, 5/16 barb outlet