98W77 Back Cap O-Ring for 9/20 Series TIG Torches (5-Pack)

Keep Your TIG Torch Sealed and Efficient

Don't let a ten-cent part ruin a hundred-dollar weld. The 98W77 O-Ring is the small but mighty hero of your TIG torch setup. Designed to fit WP-9 and WP-20 series torches, this O-ring sits on your back cap and ensures that your shielding gas goes exactly where it's supposed to—down the cup and over your weld pool—rather than leaking out the back of the handle. If you've ever noticed your gas consumption spiking or struggled with unexplained porosity despite a clean setup, a dried-out or cracked back cap O-ring is often the culprit.

We know that in a busy shop or out in the field, small parts are the first things to get lost or worn out. That's why we offer this essential replacement in a convenient 5-pack. Whether you are using a short button cap for tight spaces or a long back cap for standard work, this O-ring fits the entire 41V series of caps. It is one of the easiest maintenance fixes you can perform: simply pop off the old, worn ring and roll on a fresh one. You'll instantly restore the seal and pressure integrity of your torch.

Stop wasting Argon and start welding with confidence. These generic replacements offer the same fit and function as the big brands but at a price that makes sense for stocking up. Keep a pack in your toolbox, and you'll never be stuck waiting on a delivery truck when you should be laying beads. Compatible with all standard air-cooled 9 series and water-cooled 20 series TIG torches.