KP2743-1-62F - Lincoln Magnum PRO 550A Flush Nozzle 5/8 Inch Thread-On

High-Performance Consumables for Industrial Fabrication

The Lincoln Electric Magnum PRO Nozzle (KP2743-1-62F) is a premium expendable component engineered for high-amperage semi-automatic welding applications. Rated for 550 amps, this nozzle is designed to manage the intense thermal loads generated during heavy-duty fabrication, ensuring that the front end of your MIG gun remains cool and operational over extended duty cycles. This specific model features a standard 5/8-inch (15.9 mm) inner diameter bore, which provides excellent shielding gas coverage for a wide variety of wire sizes ranging from .035 to 1/8 inch.

A critical feature of the Magnum PRO line is the robust mechanical connection. This nozzle utilizes a thread-on design with coarse threads. Unlike fine threads that can easily cross-thread or seize due to thermal expansion and contraction, the coarse threads on the KP2743-1-62F ensure reliable seating and easy removal, even after the assembly has been subjected to extreme heat. This design consideration significantly reduces maintenance time and frustration on the shop floor.

The nozzle is manufactured with a high-quality nickel plating. This plating serves a dual purpose: it reflects radiant heat to assist in cooling the front-end consumables, and it provides a slick surface that resists spatter adhesion. Spatter that does land on the nozzle can be easily wiped or tapped away, extending the service life of the part compared to non-plated copper alternatives. The "Flush" tip relationship indicates that the contact tip sits flush with the end of the nozzle, a configuration often preferred for its balance of visibility and gas shielding in general welding positions.

This component is strictly compatible with Magnum PRO 550A Thread-On Diffusers and fits Magnum PRO 550A as well as Magnum PRO Curve HDE 350 and 550 MIG guns. It is an essential component for maintaining the integrity of the welding arc and ensuring consistent weld quality in industrial environments.