KP2742-1-50R-B25 - Lincoln Magnum PRO 350A MIG Nozzle, 1/2" Bore, 1/8" Recess (25 Pack)

Reliable Performance for the Daily Grind

Every welder knows that the front end of the MIG gun takes the most abuse. Heat, spatter, and accidental contact with the workpiece can destroy a cheap nozzle in minutes. The Lincoln Electric Magnum PRO 350A nozzle (KP2742-1-50R-B25) is built to stand up to the heat of the arc and keep you welding longer. Designed for the Magnum PRO series guns, this nozzle features a robust construction that resists spatter buildup and stays cooler than standard consumables, meaning you spend less time banging your gun against the table and more time laying beads.

The 1/8 inch recess on this nozzle is a favorite among many fabricators. It offers a perfect "middle ground" setup—it protects your contact tip from shorting out against the work surface while still allowing you to get close enough for tight fit-ups. The recess also helps funnel the shielding gas directly over the puddle, which is critical when working in drafty shops or when welding out of position. With a 1/2 inch bore, you get a focused gas column that provides excellent coverage without wasting gas, suitable for most standard wire diameters and transfer modes.

One of the best features is the thread-on design. There is nothing more frustrating than a slip-on nozzle that gets loose after it heats up, causing it to wobble or fall off mid-weld. These Magnum PRO nozzles thread securely onto the diffuser, ensuring they stay concentric and tight, no matter how hot the gun gets. This secure fit also helps transfer heat away from the tip, extending the life of your other consumables.

This 25-pack is ideal for busy shops. Having a box of fresh nozzles on hand means you never have to try and salvage a beat-up nozzle that’s clogging your gas flow. Whether you are running solid wire on mild steel or flux-cored wire in a production setting, these nozzles provide the consistency and durability professional welders expect from Lincoln Electric. Pair them with your Magnum PRO 350A tips and diffusers for a smooth, trouble-free welding experience.