Is this the correct adapter to connect a Hill Mk 4 pump to the DIN 200 adapter included with the T200 rifle?
no ; you need this item : Air Venturi SS Female DIN...
Is this can be used in Steyr Evo 10
Yes, it will attach to the fitting that comes with the steyr, but it depends on what you are attaching that to
Is this the thing that connects to the Hill mk4 pump If you fill hpa to a walther maximathor pcp?
Is this the one needed as an adapter to a walther maximathor if you use a Hill hand pump ?
Is the 1/8" male BSPP the same as CGA 347? I was told that most SCBA carbon fiber tanks use a CGA 347 valve and you need a CGA 347 to Din 300 adapter to get the 4500 psi scba tanks filled at most US dive shops.
1/8" bspp is different than an SCBA valve thread. Plus, SCBA valves have male threads. I would put an SCBA tank adapter assembly with hose and female qd (AV-000027 [Air Venturi Tank Adapter Assembly,...]) on the tank for filling guns and then you can fill through that hose using AV-00044M at a scuba shop
i think this is what we need to refill the 88cu air tank?? isn't it?
To fill the 88 cf tank with a din style you would need to add a foster quick disconnect or get Air Venturi SS Female DIN..., but this would all depend on how you are filling as the tank already has a foster style fitting.