4591 - Bernard 4591 Copper MIG Nozzle Assembly, 3/4 Inch Bore, 10-Pack

Reliable Performance with Bernard 4591 Nozzles

Keep your MIG torch running cool and clean with the Bernard 4591 Copper Nozzle/Insulator Assembly. Designed for professional welders who push their equipment to the limit, this nozzle is built to handle the heat of 400 to 500-amp welding jobs without failing. The heavy-duty copper body resists deformation and spatter buildup better than standard brass alternatives, meaning you spend less time cleaning your nozzle and more time laying down beads.

The 3/4-inch bore is a favorite among fabricators working on thick plate and heavy structural projects because it delivers a wide, stable umbrella of shielding gas. This superior coverage helps prevent weld defects like porosity, even when welding at higher currents or in draftier shop conditions. Because it comes as a pre-assembled unit with the insulator built-in, swapping out a worn nozzle is quick and hassle-free—just pull the old one off and slide the new one on. There's no need to fiddle with separate insulators or worry about misalignment.

This 10-pack ensures you have plenty of spares on hand for the long haul. Compatible with the popular Bernard Q-Gun, S-Gun, and T-Gun series, these nozzles fit securely and stay put during operation. If you are looking for a nozzle that offers a perfect balance of longevity, cooling performance, and gas coverage, the Bernard 4591 is the industry standard choice for heavy-duty MIG welding.