Not yet, still assembling the odds and ends required to start welding. Is the thread always a standard size for this sort of pea shooter?
Also, is one of these ever used for Mig welding? My Mig just has a pressure gauge calibrated in flow.
Usually 3/8" bsp, check the threads on your reg.
The gauges on the reg are not very accurate as they really indicate pressure, not flow, despite the gauge reading flow! Not as critical on mig as tig but the saving in gas costs will soon pay for a proper flow meter.