63-2138 - 401-4-38 Replacement MIG Nozzle for Tregaskiss Tough Gun

Keep Your Arc Smooth and Your Gun Running Cool

Every welder knows that the front end of the MIG gun takes the most abuse. Spatter, heat, and accidental knocks are just part of the daily grind. When it's time to swap out your nozzle, you need a part that fits right and stands up to the heat. This Tregaskiss Style 401-4-38 Nozzle is built to keep you welding without breaking the bank. Designed to fit the popular Tregaskiss 300A and 400A guns—often found in the toughest shops—this nozzle is a workhorse for your daily fabrication tasks.

What sets this nozzle apart is its geometry. It features a 3/8-inch bore, which is tighter than the standard 1/2-inch nozzles. This is perfect when you need to get into a corner or a tight spot where a wider nozzle just won't fit. Plus, it has a 3/8-inch recess. That extra depth keeps your contact tip tucked away safely inside the nozzle, protecting it from the intense heat of the arc and reducing the chance of it shorting out against the workpiece. If you are running higher voltages or just want to keep your tips lasting longer, that extra recess is a huge plus.

Installation is a breeze thanks to the standard slip-on fit. No threads to cross or get stuck with spatter. Just pull the old one off and slide this one on over your 402-3 retainer. It seats firmly, ensuring your shielding gas goes exactly where it needs to go—over the puddle—not leaking out the back. Good gas coverage means less porosity and less rework for you. Whether you are welding mild steel, stainless, or flux-cored wire, having a fresh, clean nozzle is the first step to a perfect bead.

Don't let a beat-up, clogged nozzle ruin your weld quality. This replacement gives you the performance of the big brand name without the premium price tag. It’s tough, conductive, and ready to handle the heat of your 300 or 400 amp setup. Stock up on these to keep your downtime low and your arc time high.