186404 - Miller M-25 MIG Gun Replacement Neck Tube 186404

Restore Precision to Your Miller M-25 Torch

The Miller 186404 Gun Tube Assembly is the definitive OEM replacement neck for the Miller M-25 MIG gun. Professional welders know that the "gooseneck" is the critical junction where current is transferred to the contact tip and shielding gas is directed over the puddle. When this component is compromised—whether through thread stripping, impact damage, or excessive spatter buildup—the result is often an unstable arc and porosity in the weld. This replacement assembly allows you to swap out the damaged neck quickly and get back to welding with the performance you expect from Miller Electric.

Designed with a standard angle that balances ergonomics with access to tight joints, the 186404 tube assembly integrates seamlessly with the M-25 handle and cable system. It provides a secure mounting point for your gas diffuser and nozzle, ensuring concentricity that is vital for consistent bead profile. Unlike aftermarket knock-offs that may have slight dimensional variances, this genuine Miller part guarantees that your consumables fit correctly and that the liner seats properly, preventing bird-nesting and burn-back issues.

Technical Reliability

Maintenance of the MIG gun is crucial for high-uptime manufacturing environments. The 186404 assembly includes the necessary insulation and conductive body to handle the rated amperage of the M-25 gun. It is an ideal spare part to keep in your maintenance inventory for Millermatic 200, 210, 250, and 252 systems. By replacing a worn tube, you effectively renew the front end of your torch, extending the service life of the entire machine package.

• OEM Quality: Manufactured to Miller's strict tolerances.
• Ergonomic Design: Standard bend angle reduces wrist fatigue.
• Conductivity: High-grade materials ensure efficient power delivery.