KP2743-2-75S-B25 - Lincoln Electric 550A Slip-On MIG Nozzle, 3/4 Inch Bore, 1/8 Inch Stickout, 25-Pack

Heavy-Duty Industrial MIG Consumables

The Lincoln Electric KP2743-2-75S-B25 is a premium bulk package of high-performance MIG gun nozzles designed for demanding industrial environments. Engineered to handle high-amperage welding procedures, these nozzles are rated for up to 550 amps, making them an essential component for heavy fabrication, structural steel manufacturing, and shipbuilding applications. The nozzle features a substantial 3/4-inch (19 mm) inner diameter, which is critical for maintaining adequate shielding gas coverage over large weld puddles typically generated at high amperages. This large bore size helps prevent porosity and ensures weld quality in spray transfer and pulsed MIG processes where heat input and puddle fluidity are significant factors.

Procurement managers and shop foremen will appreciate the operational efficiency provided by the slip-on design. Unlike threaded nozzles that can seize due to spatter accumulation or thermal expansion, the slip-on mechanism allows for rapid removal and replacement, minimizing downtime during consumable changeovers. The specific geometry of this nozzle provides a 1/8-inch (3.2 mm) contact tip stickout. This configuration is often preferred in specific joint designs where the contact tip needs to be closer to the work piece or where the welder requires a specific electrical stickout (ESO) for arc characteristics. The "stickout" designation implies that the contact tip protrudes slightly beyond the nozzle face, offering a different arc dynamic compared to recessed or flush nozzles.

Supplied in a convenient 25-pack, the KP2743-2-75S-B25 ensures that high-volume welding operations maintain a steady supply of critical consumables. Bulk packaging reduces the frequency of reordering and simplifies inventory management for large-scale production facilities. By standardizing on genuine Lincoln Electric consumables, facilities ensure compatibility and consistent performance across their welding fleet. These nozzles are built to withstand the rigorous thermal cycles of multi-pass welding, offering durability that translates to reduced consumable costs over time. Whether for automated systems or manual handheld welding, these nozzles deliver the reliability required for code-quality work.