KP2743-1-75S - Lincoln Magnum PRO 550A MIG Nozzle, 3/4 Inch Bore, 1/8 Inch Stickout

Keep Your Cool with the Magnum PRO 550A Nozzle

When you are pushing 550 amps, you need a front-end setup that can take the heat without failing. The Lincoln Electric KP2743-1-75S is built for welders who run hot and heavy. This isn't just a standard gas cup; it is a core part of the Magnum PRO system designed to keep your torch running cooler for longer. If you are tired of nozzles that melt, deform, or fuse to your diffuser after a long shift of spray transfer welding, this thread-on solution is the upgrade your gun needs.

The first thing you will notice is the build quality. It features a nickel-plated finish that does more than just look good—it actively repels spatter. We all know the frustration of stopping every few minutes to bang out a nozzle or scrape out berries that are choking off your gas flow. The nickel plating makes that spatter slide right off or chip away easily, keeping your gas coverage smooth and consistent. The 3/4-inch bore is wide enough to ensure your weld pool is completely shielded, even when you are weaving on heavy plate or dealing with drafts in the shop.

Let's talk about the fit. Slip-on nozzles have their place, but when precision matters, thread-on is king. The KP2743-1-75S screws securely onto the diffuser, meaning it won't wobble or fall off when the gun gets superheated. Lincoln designed these with coarse threads, so even if the nozzle gets battered and dirty, you can still unscrew it easily without needing a pipe wrench. The 1/8-inch stickout geometry is perfect for welders who prefer their tip slightly exposed, offering better visibility of the wire entering the puddle and allowing for tighter access in certain joints.

Whether you are running a Magnum PRO Curve HDE or a standard 550A gun, this nozzle integrates perfectly. It helps dissipate heat away from the contact tip, which means your tips last longer and you spend less time at the parts bin. It is a professional-grade consumable for professional welders who demand reliability under the hood.