KP3161-1-62F-B25 - Lincoln Magnum PRO 550A Flush Nozzle 5/8in Bottleneck (25-Pack)

Technical Overview of Lincoln Electric KP3161-1-62F-B25

The Lincoln Electric KP3161-1-62F-B25 is a high-performance gas nozzle designed specifically for the Magnum PRO series of semi-automatic welding guns. Engineered to withstand the rigors of heavy industrial welding, this nozzle is rated for 550 Amps, making it suitable for high-deposition MIG and flux-cored applications where heat management is critical. The unit features a 5/8-inch (15.9 mm) inner diameter bore, which provides a balanced shielding gas envelope suitable for a wide range of wire diameters and transfer modes, including spray transfer and pulsed MIG.

Structurally, the nozzle utilizes a thread-on connection mechanism. This design is superior to slip-on variants for high-amperage applications as it ensures a consistent mechanical interface with the diffuser, facilitating optimal thermal conductivity. By effectively drawing heat away from the front end of the gun, the nozzle helps maintain cooler operating temperatures for the contact tip and insulator, thereby extending the service life of the entire front-end consumable assembly. The "Flush" designation indicates that the nozzle edge sits flush with the contact tip, a configuration that balances gas coverage with arc visibility.

The physical geometry of this nozzle is described as "Bottleneck." This tapered profile reduces the outer diameter at the nozzle tip, allowing the welder to access tighter joints and corners that would be obstructed by standard cylindrical nozzles. This specific SKU (KP3161-1-62F-B25) represents a bulk package containing 25 individual units, optimized for supply chain efficiency in large-scale fabrication environments. It is directly compatible with standard Magnum PRO 550A diffusers and insulators.