0040991401 - ESAB PSF Series MIG Gun Nozzle Locking Ring (Pack of 2)

Restore Precision to Your PSF Torch

For the professional welder, the condition of your MIG gun directly influences the quality of your arc and the ease of your work. The ESAB Locking Ring (0040991401) is the specific retention mechanism used on ESAB PSF series torches (PSF 250, 305, 405, and 505) to secure the gas nozzle to the torch neck. Over time, the constant thermal cycling of heating up and cooling down can cause these rings to lose their spring tension or become deformed, leading to a loose or wobbly nozzle. A loose nozzle can cause inconsistent gas coverage, porosity in your welds, and frustration during positional welding.

This pack contains two genuine replacement locking rings, allowing you to refresh your torch setup instantly. The installation is straightforward: the ring fits onto the designated groove on the swan neck or nozzle seat, providing a positive 'snap' or friction fit that holds the nozzle concentric to the contact tip. This concentricity is vital for maintaining a laminar flow of shielding gas around the weld pool. If your current nozzle feels loose or falls off easily when tapping out spatter, it is time to replace the locking ring.

Designed to withstand the harsh environment of heavy-duty welding, these rings are made from heat-resistant alloy that resists annealing better than standard spring steel. This means they hold their tension longer, even when you are running high amperages on a PSF 405 or 505 gun. Don't let a $5 part compromise a critical weld or slow you down. Keeping a spare locking ring in your personal toolbox ensures that you can fix a loose nozzle on the fly and get back to burning wire.

Whether you are fabricating structural steel, working in a shipyard, or performing general repairs, the reliability of your equipment is paramount. The ESAB 0040991401 Locking Ring is the exact OEM part you need to restore the factory feel to your PSF gun. It eliminates the rattle and play in the front end of the torch, giving you the confidence that your equipment is ready to perform as well as you do.