99102124 - Tweco 9/16-18 Ballpoint Set Screw for MIG Guns

Keep Your Tweco MIG Gun Solid with the 9910-2124 Screw

Every welder knows that a loose MIG gun is a recipe for frustration. When your conductor tube starts to wobble or your cable connection feels sloppy, it doesn't just feel bad—it affects your weld quality. A loose connection creates resistance, which leads to heat buildup in the handle and an unstable, sputtering arc at the tip. Often, the culprit is a worn-out, stripped, or missing set screw. The Tweco 9910-2124 Ballpoint Screw is the genuine OEM replacement you need to lock everything back down and get back to smooth welding.

You might be tempted to grab a standard bolt from the hardware store to fix your gun, but that is a mistake. This isn't just any screw; it's a ballpoint screw. Why does that matter? The internal parts of your MIG gun, like the conductor tube, are usually made of brass or copper to conduct electricity efficiently. These metals are soft. If you crank down on them with a regular sharp-pointed set screw, you will dig a hole right into the part. This damages the tube, makes it impossible to adjust later, and can even ruin the threads in the gun handle. The ballpoint on this Tweco screw is designed to press firmly against the tube to hold it rock-solid without digging in or marring the surface.

This screw features a 9/16-18 thread, which is the standard for many Tweco gun assemblies. It installs easily with a hex key, allowing you to apply the right amount of pressure to ensure a perfect electrical connection. By keeping this connection tight, you ensure that the full welding current travels to the wire, giving you the consistent penetration and bead appearance you expect from Tweco equipment. Don't let a fifty-cent problem cause a five-hundred-dollar failure. Keep a few of these 9910-2124 screws in your maintenance kit so you can fix a loose neck instantly and keep production moving.