Germany
Filling adapter for carbonic acid for filling CO2 and argon cylinders with valves according to DIN 477-6 which have a flow-off protection/residual pressure valve. The thread W21.8 is used for all gas cylinder valves that are used for shielding gas welding, argon, helium, carbonic acid and argon mixed gases.
Adapter for oxygen to normal air, extanded threads
filling and removing adapter for oxygen / air; to fill nitrox tanks with oxygen valve.
Adapter Air (5/8") -- inert gas (W21.8) inside / inside
Monovalve Compressed Air 230 Bar Standard diving tank valve with bottle neck thread M18x1.5mm. Smaller gas cylinders and diving tanks have the smaller bottle neck thread. In the past, these pressure vessels were equipped with the small conical thread, while newer ones often have the M18x1.5mm bottle neck thread. Sealing is achieved with an O-ring.