15431112 - Tweco 1543-1112 Heavy Duty Gas Diffuser Head for Bernard Style Guns

Reliable Performance for Your MIG Torch

Keep your MIG gun running smoothly with the Tweco 1543-1112 Heavy Duty Gas Diffuser. If you are running a Bernard-style setup, you know that the head (or diffuser) is the heart of your front-end consumables. It anchors your contact tip and ensures your shielding gas flows without turbulence. This Tweco replacement for the popular Bernard 4335 head is built tough to handle the heat of the shop, giving you one less thing to worry about when you're under the hood.

Why settle for flimsy parts? This diffuser is machined from solid brass, designed to withstand the thermal shock of high-amperage welding. It fits perfectly with your standard elliptical contact tips (the ones you twist a quarter-turn to lock) and secures your nozzle firmly in place. A worn-out diffuser can lead to loose tips, erratic arcs, and poor gas coverage, ruining your welds and wasting your time. Swapping in a fresh Tweco 1543-1112 restores that crisp, consistent electrical connection you need for stacking dimes.

Designed for the professional welder, this head is compatible with the classic Bernard Q-Gun and S-Gun series. It's a direct fit, meaning no modifications or headaches—just screw it onto the gooseneck, lock in your tip, and get back to burning wire. Whether you are pushing 300 amps on structural steel or doing detail work in the fabrication bay, this heavy-duty diffuser delivers the reliability you expect from Tweco products.