Morning all. I have just bought myself a second hand gas/gas less welder as above. It seems to have been mullered a bit in terms of its shroud and tips. I have managed to establish that the tips are M5 and 0.8 for the gasless wires but I'm not sure about the shrouds. The one that came off was a push fit...very tight, although there is a threaded section of the nozzle that suggests it should be threaded. Does it really matter which or should it only have one or the other? Thanks for any help.