KP2743-2-75R-B25 - Lincoln Electric 550A Slip-On MIG Nozzle, 3/4" Bore, 1/8" Recess (25 Pack)

High-Performance Lincoln Electric MIG Nozzles for Heavy Fabrication

The Lincoln Electric KP2743-2-75R-B25 is a premium gas nozzle designed to meet the rigorous demands of high-amperage MIG welding. Rated for up to 550 amps, this consumable is engineered for industrial environments where heat resistance and durability are paramount. The nozzle features a substantial 3/4 inch (19 mm) inner diameter, which provides a wide umbrella of shielding gas coverage. This large bore is particularly beneficial when welding at higher currents or when using larger diameter wires, as it ensures the weld pool remains fully protected from atmospheric contamination, reducing the risk of porosity and ensuring high-quality weld deposits.

One of the key design features of this nozzle is its 1/8 inch (3.2 mm) recess. By recessing the contact tip slightly inside the nozzle, the design offers enhanced protection for the tip against radiant heat and spatter. This recess also helps to minimize the likelihood of electrical shorts occurring if the nozzle accidentally touches the workpiece, a common occurrence in tight spaces or during complex maneuvers. The recess geometry is optimized to maintain a stable arc while allowing for appropriate electrode stick-out, giving the operator better control over the welding process.

Efficiency in the workshop is driven by ease of maintenance, and the slip-on connection of the KP2743-2-75R makes it a favorite among professional welders. Unlike threaded nozzles that can seize due to thermal expansion or spatter buildup, this slip-on model can be removed and replaced in seconds without the need for specialized tools. This friction-fit design ensures a secure hold during operation while facilitating quick cleaning or replacement during shift changes. Supplied in a convenient bulk pack of 25, this product ensures that your welding stations remain stocked, minimizing downtime associated with waiting for replacement parts.

Genuine Lincoln Electric consumables are manufactured to tight tolerances to ensure consistent fit and performance with compatible MIG guns. Whether you are working in structural steel fabrication, heavy equipment manufacturing, or general industrial repair, these nozzles provide the reliability required to maintain high productivity levels. The robust construction withstands the thermal cycling inherent in 550A welding procedures, offering a longer service life compared to standard duty nozzles.