16401121 - Tweco 1640-1121 Flexible Gooseneck for #3 and #4 MIG Guns

Reach the Unreachable with the Tweco Flexible Gooseneck

Every welder knows the frustration of a joint that is just out of reach. You angle your head, you twist your wrist, but a standard rigid MIG gun neck just won't clear the obstruction. That is exactly where the Tweco 1640-1121 Flexible Conductor Tube saves the day. Designed to fit your trusty Tweco #3 or #4 MIG gun, this "gooseneck" isn't just a replacement part—it's an upgrade to your daily versatility. Instead of being stuck with a fixed angle, this tube allows you to bend the neck to the specific angle required for the job at hand.

Imagine welding inside a pipe cluster, around a tight baffle, or underneath a chassis where a standard 60-degree or 45-degree neck hits the wall before the nozzle reaches the root. With the 1640-1121, you can adjust the curve of the neck to snake around obstacles, giving you a clear line of sight and a proper gun angle. This means better gas coverage, less porosity, and a lot less frustration. It comes out of the box with a standard 60-degree bend, but it is ready to be customized by you, on the fly, to suit whatever the blueprint throws your way.

Despite being flexible, this tube is built Tweco-tough. It handles the heat of 300A and 400A applications without melting down or losing conductivity. It uses the same consumables—diffusers, nozzles, and contact tips—that you already have in your toolbox for your #3 and #4 guns, so there is no need to buy a whole new set of front-end parts. Swapping it out is simple: just unscrew your old rigid neck and screw this one in. It’s a tool that pays for itself the first time you don't have to struggle with a bad angle.

Don't let a rigid torch limit your skill. Upgrade your setup with the Tweco 1640-1121 Flexible Conductor Tube and put the weld exactly where it needs to go, comfortably and professionally. Whether you are in a fab shop, a garage, or on a heavy industrial site, having a flex neck in your arsenal is the mark of a welder who is ready for anything.