According to DIN EN ISO 2503 Acetylene: Cylinder connection clamp Hose connection G 3/8 LH x LW 9 left-hand thread Identification colour: yellow Oxygen: Cylinder connection G 3/4 I Hose connection G 1/4 LW 6 right-hand thread Identification: blue Argon /CO2: Cylinder connection W 21.8 x 1/14” Hose connection G 1/4 LW 6 right-hand connection Identification colour: black Nitrogen (e.g. for tyre gas, air conditioning flushing or testing): Cylinder connection: W 24.3 x 1/14“ I Hose connection: G 1/4 x LW 6 right-hand thread Identification colour: green Art. No. 5380 714: For the adaption of pressure reducer nitrogen Art. No. 5400 44 (10 bar) or Art. No. 5400 45 (20 bar) and air conditioning hose blue, Art. No 5380 604 or red, Art. No. 5380 605 for leak testing or flushing
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