My MIG gun fittings became so worn it was easy for the nozzles to fall off or pull off. It was very unhandy. So, last August I wrapped the gun fit area with teflon tape to make the nozzle fit snugly onto the diffuser. I made sure that the tape did not clog any of the gas outlet ports.
This has worked well for three months so far. Maybe eventually it would be better to replace the O ring.
The tape wrap is looking pretty tacky now but the nozzle hasn’t fallen off once.
|Initial appearance of the teflon tape.|
|Current appearance at three months.|