86W85 - ESAB PT-31 Plasma Torch O-Ring Replacement (10-Pack)

Keep Your PT-31 Torch Running Smoothly

There is nothing more frustrating than a plasma cutter that hisses, sputters, or refuses to hold a steady arc right when you need to make a critical cut. Often, these issues aren't caused by the machine itself, but by a tiny, worn-out seal inside your torch. The ESAB 86W85 O-Ring is the exact replacement part you need to fix gas leaks in your PT-31 or PT-31XL plasma torch. This simple rubber ring is the gatekeeper of your air pressure; if it's cracked, dried out, or flattened, your air escapes before it can do its job, leading to poor cuts and wasted consumables.

This pack contains 10 O-rings, which is a smart investment for any shop. O-rings are small and easy to lose during a field repair, and they are the first thing to check when your torch starts acting up. With a 10-pack in your toolbox, you can swap out a questionable seal immediately rather than trying to limp along with a leaking torch. The dimensions (.468" ID x .070") are factory-matched to your ESAB equipment, so you don't have to worry about forcing a generic hardware store O-ring into the groove and hoping it holds.

Installation is straightforward. Simply disassemble the torch head, remove the old, brittle O-ring, and clean the groove gently with a soft cloth. Roll the new 86W85 into place—being careful not to twist it—and you are back in business. A good seal means your air flows where it's supposed to, cooling the electrode and focusing the plasma arc for that clean, dross-free cut you expect. Don't let a fifty-cent part stop a thousand-dollar job; keep your maintenance kit stocked with these genuine ESAB replacements.

Whether you are a hobbyist using a portable cutter or a professional fabricator relying on your PT-31 daily, preventative maintenance is key. We recommend checking your O-rings every time you change your electrode or nozzle. If the ring looks squared off or has nicks, toss it and grab a fresh one from this bag. It’s the cheapest insurance you can buy for your plasma cutting setup.