636927 - ESAB ST-23A Replacement Control Knob

Get Your ST-23A Back in Action

There is nothing more annoying than a great piece of gear being sidelined by a tiny broken plastic part. If you are running an ST-23A MIG gun—one of the workhorses of the industry—you know it's built to last, but the knobs and small external parts can take a beating. Whether it got smashed when the gun was dropped, stripped out from years of use, or just mysteriously vanished in the shop, the ESAB 636927 Knob is the exact part you need to fix it. Don't try to rig it with tape or pliers; get the right part that snaps on and works like new.

Built for the Shop Floor

We know that welding gloves make everything harder to handle. That's why this OEM knob is designed with the right texture and size to be adjusted even when you are geared up. It is made from tough material that isn't going to melt the first time it gets near a hot weld or crack if it gets knocked against the bench. It’s the same quality as the one that came on the gun when it was new, so you know it fits right and holds tight.

Quick and Easy Repair

You don't need to be a certified repair technician to swap this out. It’s a simple replacement that takes seconds, but it makes a huge difference in how your torch feels and handles. Keeping your equipment in good shape shows professionalism and keeps your welds consistent. If your current knob is loose, spinning freely, or missing entirely, it’s a safety hazard and a nuisance. Swap it out with this genuine ESAB part and get back to laying beads without fighting your equipment.

Why Buy Genuine?

Sure, you might find something that "sort of" fits at the hardware store, but it won't last. This knob is designed for the heat and abuse of a welding environment. It matches the threads or fitting on your ST-23A perfectly, so you don't have to worry about it falling off in the middle of a job. It’s a small investment to keep a reliable tool running for years to come.