I have a 30lb R134a tank that has the same type of connector to connect to a set of automotive refrigerant gauges but my gauges are for air conditioning in private households. So I needed an adapter so I could connect my regular AC sensors to the tank with the r134a. When servicing a fridge with standard refrigeration connections, I only need this adapter. Of course I still need other adapters to connect the gauges to the car air conditioner but this adapter worked to connect this car gauge on my 134a tank to my gauge kit. It also has a rubber gasket inside so you can just hand tighten it and get a good seal. Appears to be high quality brass.
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