KP2743-1-62RA - Lincoln Electric KP2743-1-62RA Magnum PRO 550A Aluminum MIG Nozzle, 5/8" Bore, 1/8" Recess

High-Performance Nozzle for Aluminum Welding

Take your aluminum welding projects to the next level with the Lincoln Electric KP2743-1-62RA Magnum PRO 550A MIG Nozzle. When you are pushing 550 amps, you need consumables that can take the heat without failing. This nozzle is built specifically for that purpose, offering a heavy-duty solution for welders using Magnum PRO series guns. The 5/8-inch bore is the sweet spot for aluminum applications, delivering a wide, laminar flow of shielding gas that effectively protects the molten puddle from atmospheric contamination. This helps you achieve X-ray quality welds with minimal porosity.

One of the biggest frustrations in MIG welding is dealing with spatter buildup inside the nozzle. Lincoln Electric addresses this with a high-quality nickel plating that resists spatter adhesion. This means you spend less time scraping out your nozzle and more time laying down beads. The 1/8-inch recess is perfectly calculated to keep your contact tip cool and protected while allowing for excellent visibility of the weld pool. Whether you are working on a boat hull, a trailer, or structural aluminum components, this nozzle helps maintain the consistency required for professional results.

The thread-on design of the KP2743-1-62RA is a game-changer for stability. It locks onto the diffuser with coarse threads that are designed to hold tight during operation but unscrew easily when it's time for a changeout. This eliminates the wobble often associated with slip-on nozzles, ensuring your gas coverage remains centered over the wire. Compatible with a range of Lincoln guns including the Magnum PRO AL 225A and 450W, this nozzle is the reliable choice for professional fabricators who demand the best from their equipment.