KP2743-2-75F-B25 - Lincoln Magnum PRO 550A Flush Nozzle 3/4 Inch Bore (25 Pack)

Heavy-Duty Consumables for Industrial Fabrication

The Lincoln Electric KP2743-2-75F-B25 is a premium-grade MIG welding nozzle designed to meet the rigorous standards of heavy industrial fabrication. Engineered specifically for the Magnum PRO series of semi-automatic welding guns, this nozzle is rated for 550 amps, making it an essential component for high-heat, high-deposition welding applications. In environments where equipment reliability directly impacts production schedules, using genuine Lincoln Electric consumables ensures that your welding systems operate at peak efficiency. This bulk package contains 25 nozzles, offering a cost-effective solution for large-scale manufacturing operations that require a consistent inventory of replacement parts to minimize downtime.

The nozzle features a substantial 3/4-inch (19 mm) inner diameter. This large bore size is critical for high-amperage welding, as it allows for a higher volume of shielding gas flow. Adequate gas coverage is paramount when welding at 550A to prevent atmospheric contamination and porosity in the weld pool. The larger opening also helps in managing the intense heat generated during the process, reducing the likelihood of the nozzle overheating or deforming during extended arc-on times. Constructed from high-quality copper alloy, these nozzles are built to resist spatter adhesion, which simplifies cleaning and extends the operational life of each unit.

Designed with a "Flush" tip geometry, the KP2743-2-75F places the contact tip even with the end of the nozzle. This configuration is widely preferred in structural steel and heavy equipment manufacturing because it offers a versatile balance between gas shielding efficiency and joint accessibility. The flush design ensures that the contact tip is sufficiently shrouded by gas while still allowing the welder to maintain a reasonable stick-out for visibility. Furthermore, the slip-on connection mechanism eliminates the frustration of seized threads, allowing operators to replace nozzles quickly and securely, even in the middle of a shift. By choosing the KP2743-2-75F-B25, facilities invest in consistent weld quality and operational continuity.