DIN 477-6
According to DIN 477-6 standard with W21.8x1/14 thread for argon, carbon dioxide, helium, and many more.
Thread adapter for filling and withdrawing cylinders with noble gas, carbon dioxide, argon, or helium valves 200 bar with W21.8 and residual pressure valve to compressed air G5/8" 200 bar female thread.
Filling adapter for carbon dioxide for filling CO₂ and argon cylinders with valves according to DIN 477-6 equipped with a residual pressure valve (RPV). The W21.8 thread is used for all cylinder valves applied in shielding gas welding, including argon, helium, carbon dioxide, and argon gas mixtures.
Thread adapter noble gas W21.8 male thread – noble gas W21.8 male thread, double nipple for connecting welding gas fittings for argon, helium, carbon dioxide, …