KP2743-1-62S-B25 - Lincoln Magnum PRO 550A MIG Nozzle, 5/8" ID, 1/8" Stickout, Thread-on (25-Pack)

Heavy-Duty MIG Nozzles for Professional Fabrication

Keep your welding operations running smoothly with the Lincoln Electric KP2743-1-62S-B25 Magnum PRO Gas Nozzle. Designed for professional welders who demand reliability under pressure, this nozzle is rated for 550 amps, making it suitable for high-deposition MIG and flux-cored welding processes. When you are pushing high wire feed speeds and high voltage, you need a nozzle that can take the heat without deforming or fusing to the diffuser, and the Magnum PRO series delivers exactly that.

This specific model features a 5/8-inch bore, which is the standard for general-purpose and heavy-plate welding, providing a robust column of shielding gas to protect the molten puddle. The 1/8-inch stickout configuration is favored by many operators for its ability to get the contact tip closer to the work when necessary, while still offering protection. It is particularly useful when you need that extra bit of reach or prefer the visibility of the wire tip sticking out past the nozzle edge. The thread-on design is a significant upgrade over slip-on models, ensuring the nozzle stays concentric and tight, even after hours of continuous welding.

Spatter buildup is the enemy of productivity, and Lincoln's high-quality copper construction helps minimize adherence, making it easier to clean the nozzle with a pair of welpers or a reamer station. Regular maintenance of your nozzle bore ensures laminar gas flow, reducing the risk of weld defects. This 25-pack bulk option is perfect for tool cribs and welding supply lockers, ensuring that your team never runs out of critical consumables in the middle of a job.

Pairing these nozzles with the correct Magnum PRO diffusers and contact tips creates a highly efficient front-end assembly. The "Cooler-Running" technology inherent in the Magnum PRO line dissipates heat faster than standard MIG guns, keeping your consumables lasting longer and your operators more comfortable. Upgrade your torch setup with these genuine Lincoln Electric parts and experience the difference in arc consistency and consumable longevity.