KP2743-1-62F-B25 - Lincoln Magnum PRO 550A Flush Nozzle 5/8-in Thread-on (25-Pack)

High-Performance Consumables for Heavy Fabrication

The Lincoln Electric KP2743-1-62F-B25 is a premium bulk package of 25 Magnum PRO Gas Nozzles, engineered to meet the rigorous demands of high-amperage semi-automatic welding. Designed specifically for the Magnum PRO series of MIG guns, these nozzles are rated for operation up to 550 amps, making them an essential component for heavy industrial fabrication, structural steel work, and manufacturing environments where duty cycles are demanding and heat generation is significant.

Optimized Geometry and Design

This specific nozzle features a 5/8-inch (15.9 mm) inner diameter, a standard size that balances gas coverage with accessibility. The "Flush" designation indicates that the nozzle tip sits flush with the contact tip when installed. This geometry is particularly advantageous for welders requiring excellent visibility of the weld puddle and arc, as it removes the recess that can sometimes obscure the view in tight corners. The flush design is also beneficial for maintaining a consistent electrical stick-out in various welding positions, ensuring stable arc characteristics.

Secure Thread-On Connection

Unlike slip-on nozzles that can become loose over time due to thermal expansion and contraction, the KP2743-1-62F utilizes a robust thread-on connection. This design ensures the nozzle remains concentrically aligned with the contact tip and diffuser, preventing uneven gas coverage that could lead to porosity. The secure fit also maximizes heat transfer from the nozzle to the gun's neck, aiding in cooling and prolonging the life of the front-end consumables.

Durability and Value

Manufactured from high-quality copper alloy, these nozzles are built to withstand the spatter and radiant heat associated with 550A welding processes. The bulk B25 packaging offers significant value for high-volume shops, reducing the frequency of reordering and ensuring that operators always have fresh consumables on hand to maintain productivity. By choosing genuine Lincoln Electric parts, users ensure compatibility and performance consistency across their welding operations.