0459990136 - ESAB 4.0x1.0mm Gas Euro-Connector O-Ring

Stop Leaks and Protect Your Welds

Is your MIG gun sputtering, or are you noticing porosity in your welds despite having a full gas bottle? The culprit might be smaller than you think. This ESAB O-Ring (4.0mm x 1.0mm) is the tiny hero that seals the gas connection in your Euro connector. Over time, the O-rings on your MIG gun's connector can dry out, crack, or get flattened from constantly plugging and unplugging the gun. When that happens, your expensive shielding gas escapes before it ever reaches the weld puddle.

Replacing this O-ring is one of the cheapest and easiest fixes you can do to improve your welding performance. Designed specifically for the gas nipple on Euro-connectors, this 4.0mm x 1.0mm ring creates a tight seal to ensure 100% of your gas goes exactly where it's needed—over your arc. Don't let a ten-cent leak ruin a thousand-dollar project. Keeping a few of these genuine ESAB spares in your toolbox means you can fix a leak in seconds and get back to laying down smooth, clean beads.

Whether you are running a production line or working in a garage, equipment maintenance is key. This O-ring fits perfectly on compatible ESAB Euro-connections, restoring the factory-tight seal you had when the machine was new. Check your connector today; if the O-ring looks worn or is missing, this is the exact part you need to get back up and running.