KP2743-2-75F - Lincoln Magnum PRO 550A Flush MIG Nozzle 3/4-inch Slip-On

Lincoln Electric KP2743-2-75F Magnum PRO 550A MIG Nozzle

The Lincoln Electric KP2743-2-75F is a premium slip-on MIG nozzle designed specifically for the high-performance Magnum® PRO 550A welding gun series. Engineered for heavy-duty industrial environments, this nozzle features a substantial 3/4-inch (19 mm) inner diameter bore. This large opening is critical for maintaining adequate shielding gas coverage when welding at higher amperages, ensuring that the weld pool remains protected from atmospheric contamination even during intense fabrication tasks. As a genuine Lincoln Electric consumable, it guarantees a perfect fit and optimal conductivity within the Magnum PRO system.

One of the standout features of this nozzle is its flush tip relationship. A flush nozzle aligns the end of the contact tip with the end of the nozzle, offering a middle ground between the accessibility of a tapered/protruding tip and the gas protection of a recessed tip. This configuration is widely used in general fabrication because it allows the welder to get close to the work while still maintaining a reasonable contact tip-to-work distance (CTWD). The slip-on connection mechanism further enhances productivity by allowing operators to remove the nozzle quickly for cleaning or replacement without the need for wrenches or threads that can seize up due to heat and spatter.

Durability is a key focus of the Magnum PRO line. The KP2743-2-75F is nickel-plated, a surface treatment that significantly reduces the adhesion of weld spatter. In high-amperage applications where spatter generation can be significant, this plating prevents the buildup of molten material inside the nozzle, which can otherwise disrupt gas flow and cause porosity. By resisting spatter buildup, the nozzle lasts longer and requires less frequent cleaning, ultimately driving down consumable costs and increasing arc-on time. This nozzle is compatible with wire sizes ranging from 0.035 inches up to 1/8 inches, making it a versatile choice for structural steel, heavy equipment manufacturing, and other demanding sectors.

Key Features:

• High Amperage Capacity: Rated for use with 550A Magnum PRO guns.


• Optimal Gas Flow: 3/4-inch bore ensures broad gas coverage.


• Spatter Resistance: Nickel plating minimizes spatter adhesion and simplifies cleaning.


• Easy Maintenance: Slip-on design allows for tool-free removal.