14K12 - ESAB 14K12 TIG Torch Back Cap O-Ring (5-Pack)

Stop Leaks and Save Gas

Is your TIG torch hissing, or are you noticing unexplained porosity in your welds? It might be time to check your back cap O-ring. The ESAB 14K12 O-Ring is the standard replacement seal for the back caps on 17, 18, and 26 series TIG torches. These small rubber rings play a huge role in your setup by sealing the connection where the back cap screws into the torch head. If this seal fails, you lose precious argon and risk sucking air into your shield, ruining your bead.

O-rings don't last forever. Heat, pressure, and constant tightening can cause them to flatten out, crack, or tear. That's why we offer this convenient 5-pack. Keep them in your toolbox or consumable kit so you never have to stop a job because of a failed ten-cent part. Swapping them out takes seconds: just roll the old one off the back cap and roll the new one on. It’s one of the cheapest and easiest ways to keep your torch running at peak performance.

Designed to fit perfectly on all standard air-cooled (17, 26) and water-cooled (18) torches, these O-rings offer a snug fit that restores the airtight integrity of your equipment. Don't let a worn-out seal waste your gas or compromise your weld quality—stock up on these essential spares today.