169731 - Miller M-25 MIG Gun Replacement Head Tube 50 Degree

Get Your M-25 Gun Back in Action

If you are running a Millermatic 250, 252, or the classic 200, you know the M-25 MIG gun is an absolute workhorse. But even the toughest tools take a beating. If you've dropped your gun one too many times, or if you are fighting wire drag that a new liner just won't fix, it might be time to replace the neck. The Miller 169731 Head Tube (often called a gooseneck or swan neck) is the direct replacement for your standard M-25 setup. It comes with the factory standard 50-degree bend, which is that perfect sweet spot for general fabrication—steep enough to get into corners but open enough to keep your wire feeding smooth.

Why bother with a genuine Miller neck? Because fitment matters. Cheap knock-offs often have poor threads or slightly off-angles that make installing your diffuser and nozzle a pain. This OEM tube fits perfectly into the handle of your M-25, tightens down securely, and rotates just like it should so you can weld comfortably in any position. The copper construction is built to handle the heat, and the internal dimensions are smooth to prevent your wire from snagging as it makes the turn toward the contact tip. A worn-out neck is a hidden cause of frustration; internal grooves can cause the wire to chatter, leading to an unstable arc and ugly spatter.

Installation is straightforward. You don't need to be a certified technician to swap this out. Simply loosen the retaining nut at the handle, pull the old tube, and slide this one in. It's a quick fix that can make an old gun feel brand new again. Whether you are welding in a production shop, a garage, or out in the field, keeping your torch in top shape is the best way to keep your welds looking good. Don't let a bent or clogged neck slow you down—grab a fresh Miller 169731 and get back to laying beads.