KP2742-1-50S - Lincoln Electric KP2742-1-50S Magnum PRO 350A MIG Nozzle, 1/2" ID, 1/8" Stickout

Experience the Magnum PRO Difference

For professional welders running Lincoln's Magnum PRO 350A guns, the KP2742-1-50S nozzle is the standard for reliability and ease of use. If you are tired of wrestling with nozzles that fuse to your diffuser or get clogged with spatter halfway through a shift, this thread-on nozzle is the solution. The 1/8-inch stickout is a favorite among operators because it keeps the contact tip recessed just enough to protect it from the arc's heat, yet close enough to give you excellent visibility of the puddle. This balance helps you maintain a tight arc and consistent bead profile without constantly worrying about burning back your tip.

One of the biggest headaches in MIG welding is spatter buildup. Lincoln Electric addresses this with a high-quality nickel plating on the KP2742-1-50S. This slick finish prevents molten metal from bonding tightly to the nozzle walls. Often, a simple tap is all it takes to clear the shroud, keeping your gas flow smooth and your welds clean. When it is finally time to swap out the nozzle, you will appreciate the coarse thread design. Unlike fine threads that can cross-thread or seize up when hot, these coarse threads are designed to spin on and off easily, even after a long day of welding at high amperages.

This nozzle is rated for 350 amps, making it a workhorse for structural steel, heavy fabrication, and general manufacturing. The 1/2-inch bore gives you a focused column of shielding gas, perfect for getting into standard fillets and grooves without wasting gas. It is designed to work seamlessly with Lincoln's 350A thread-on diffusers, ensuring that your front-end parts fit together perfectly every time. Don't settle for generic replacements that rattle or misalign; stick with genuine Magnum PRO consumables to keep your gun running cool and your welds passing inspection.