KP3161-1-62F - Lincoln Magnum PRO 550A Thread-On MIG Nozzle, 5/8" Flush, Bottleneck

High-Performance Consumables for Magnum PRO Systems

The Lincoln Electric KP3161-1-62F is a premium gas nozzle designed specifically for the Magnum PRO 550A series of semi-automatic MIG welding guns. Engineered for heavy-duty industrial environments, this nozzle supports amperage ratings up to 550A, making it suitable for high-deposition welding and prolonged arc-on times. The nozzle features a 5/8-inch (15.9 mm) inner diameter bore, which provides a balanced shielding gas envelope for standard wire sizes ranging from .035 to 1/8 inch.

One of the standout features of this component is its thread-on connection style. Unlike slip-on nozzles that can loosen or become misaligned over time due to thermal expansion, the thread-on interface locks the nozzle securely to the diffuser. This ensures that the contact tip remains concentric within the nozzle bore, a critical factor for maintaining consistent electrical stick-out and gas coverage. The bottleneck shape tapers towards the outlet, offering welders better visibility of the weld puddle and improved access to tight joints without sacrificing gas flow volume.

Durability is enhanced through Lincoln's specialized nickel plating. This coating serves as a barrier against spatter adhesion, preventing the buildup of molten material that can obstruct gas flow and cause turbulence. By resisting spatter, the nozzle requires less frequent cleaning and replacement, ultimately reducing downtime and consumable costs. The flush tip relationship is designed for general welding applications where the contact tip is flush with the end of the nozzle, allowing for a standard electrical stick-out that is easy to control.

This nozzle is an essential replacement part for maintaining the efficiency of your Magnum PRO 550A setup. It is compatible exclusively with 550A thread-on diffusers, ensuring a unified system that manages heat effectively to keep the front-end consumables cool during operation.