Pneumatic Connectors handbook - Parker Hannifin
CSA certified components quality assured with over-flow protection. (if the hose connect have leakage, the gas will be close on the regulator part prevent gas leakge problem) Similar item to consider Hooshing QCC1 Propane Adapter Gas Regulator Valve Fitting with Acme Nut and 1/4 Inch NPT Male Pipe Thread
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