I think it is the same as mine. Snap-on Turbo130 (Also same as Cebora Mig 130). These are all the same machine re-badged. If so, it is 4mm push-in x 1/8" BSPT.
Air / Water / Vacuum. PUSH IN FITTING. Temperature Range: 0-60°C.
www.ebay.co.uk
I had a gas leak on my torch. Replaced the same part on mine, but there was also a leak from where the black plastic bit on the end of the trigger wire mates against the brass block (where you have taped over). I replaced the o-ring, smeared it with silicon grease, and that seems to have cured it. See my post on this thread from Oct. 24th. (Snap-on Torch leak). I was using vast quantities of gas in double-quick time. Did some welding this morning, and it seems fine now. Good luck.
Hi mate
Thanks for that. 1/8 bsp is 9.7mm diameter. My fitting is 6mm. Ive ordered a couple of fittings with 6mm x 0.75 thread. 6mm x 1.0 didn't fit. They should be here today, so will see if they fit.