KP2743-1-62S - Lincoln Magnum PRO 550A MIG Nozzle, 5/8 Bore, 1/8 Stickout, Thread-On

Maximize Performance with Magnum PRO 550A Nozzles

When you are pushing 550 amps, your welding gun is under extreme stress. The Lincoln Electric KP2743-1-62S Magnum® PRO Nozzle is built to take the heat so you can keep laying down perfect beads. This isn't just a piece of copper; it is a high-performance component designed to keep your front-end consumables cool and your arc stable. If you are running a Lincoln Magnum PRO 550A gun, this thread-on nozzle is the exact replacement you need to maintain factory-spec performance.

Built for the Grind
Spatter is the enemy of productivity. That is why Lincoln Electric coats these nozzles in a durable nickel plating. Unlike standard copper nozzles that seem to attract spatter like a magnet, the nickel finish acts as a shield, preventing molten metal from sticking. This means you spend less time scraping out your nozzle and more time welding. When you do need to clean it, the spatter usually flakes right off, extending the life of the part and saving you money on replacements.

Precision and Reliability
The 1/8-inch stickout is a favorite among professionals who need a balance between tip protection and puddle visibility. It keeps your contact tip recessed just enough to stay out of the harshest heat but close enough to give you excellent control over your arc. The 5/8-inch bore delivers a smooth, laminar flow of shielding gas, ensuring your weld pool is fully protected from atmospheric contamination. Plus, the thread-on design means no more loose nozzles. Once you twist it on, it stays locked in place, perfectly aligned with your contact tip for consistent electrical conductivity and gas coverage.

Easy Maintenance
Have you ever had a nozzle seize up on the diffuser? It’s a nightmare. The KP2743-1-62S features specially designed coarse threads that resist seizing, even after hours of high-amperage welding. This makes swapping out consumables quick and painless, keeping your downtime to a minimum. Whether you are in heavy fabrication, structural steel, or manufacturing, this nozzle delivers the reliability you expect from the Lincoln Electric brand.