The Lincoln Electric KP2743-1-75F Magnum PRO 550A MIG Nozzle is a premium consumable engineered for heavy-duty industrial welding environments. Designed to withstand the rigors of high-amperage applications, this nozzle is rated for up to 550 amps, making it an essential component for structural fabrication and heavy manufacturing. The nozzle features a substantial 3/4 inch (19 mm) inner diameter, providing a wide gas envelope that ensures superior shielding coverage for large weld puddles.
One of the standout engineering features of the Magnum PRO line is the focus on thermal management and longevity. This specific nozzle utilizes a thread-on connection mechanism. Unlike slip-on nozzles that can become loose or misaligned, the threaded design ensures precise concentricity with the contact tip, resulting in a stable arc and consistent gas flow. The threads are cut coarsely, a deliberate design choice that prevents the nozzle from seizing to the diffuser, even after repeated heating and cooling cycles. This ensures that maintenance and replacement remain quick and tool-free in most scenarios.
Durability is further enhanced by the nickel-plated finish. In high-heat welding, spatter adhesion is a common issue that degrades nozzle performance and restricts gas flow. The nickel plating acts as a barrier, resisting spatter buildup and allowing for easy cleaning. This flush-tip version places the nozzle exit flush with the contact tip, a configuration often preferred for its balance of gas coverage and stick-out visibility. It is strictly compatible with 550A thread-on diffusers found on Magnum PRO and Magnum PRO Curve HDE series guns.
| Additional Information |
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| packaging-description:1 Per Ea |
| ----- new values below ---- |
| Amperage Rating:550 A |
| Bore Size:3/4 in (19 mm) |
| Tip Relationship:Flush |
| Connection Type:Thread-On |
| Compatible Series:Magnum PRO 550A, Magnum PRO Curve HDE |
| Material Finish:Nickel Plated |
| Brand:Lincoln |
| Packaging Description:pack of 1 |
