KP2743-1-38R-B25 - Lincoln Magnum PRO 550A MIG Nozzle, 3/8 Inch ID, 1/8 Recess (25-Pack)

Industrial Grade Magnum PRO Nozzles (25-Pack)

The Lincoln Electric KP2743-1-38R-B25 is a bulk package of high-performance gas nozzles designed for the Magnum PRO series of MIG welding guns. Engineered for heavy-duty industrial environments, these nozzles are rated for up to 550 amps, making them suitable for high-heat applications where durability and thermal resistance are critical. This specific model features a 3/8-inch (9.5 mm) inside diameter (ID) and a 1/8-inch (3.2 mm) contact tip recess, providing a specific balance of gas coverage and accessibility.

Part of the Magnum PRO consumable platform, these nozzles are manufactured to strict tolerances to ensure a secure fit and optimal electrical insulation. The 3/8-inch bore is narrower than standard 5/8-inch or 1/2-inch nozzles, allowing welders to access tighter joints and corners without sacrificing the shielding gas envelope required for quality welds. The 1/8-inch recess positions the contact tip slightly back inside the nozzle, offering protection against mechanical damage and reducing the accumulation of spatter on the tip face.

This product is supplied as a bulk pack containing 25 units, designed for fabrication shops, manufacturing plants, and large-scale operations that require a consistent supply of consumables. By utilizing genuine Lincoln Electric parts, operators ensure compatibility with their Magnum PRO torch setups, maintaining the integrity of the gas diffuser and insulator connections. The robust construction withstands the rigors of daily welding, minimizing downtime associated with frequent nozzle changes.

Whether used in structural steel fabrication, automotive manufacturing, or general heavy equipment repair, the KP2743-1-38R-B25 delivers reliable performance. Its design facilitates smooth gas flow, reducing turbulence and porosity risks, while the high amperage rating ensures it can handle the heat of prolonged welding cycles.