KP3161-1-62R - Lincoln Magnum PRO 550A Thread-On Bottleneck Nozzle 5/8 ID

Optimize Your Magnum PRO 550A with the KP3161-1-62R Bottleneck Nozzle

Welding at 550 amps requires consumables that can take the heat without failing, and the Lincoln KP3161-1-62R is built exactly for that challenge. This thread-on bottleneck nozzle is a genuine Lincoln Electric replacement part for Magnum PRO 550A MIG guns, offering professional welders the reliability they need for heavy-duty projects. Whether you are welding thick structural beams or running long passes in a manufacturing cell, this nozzle helps keep your gun running cool and your welds clean. It is designed to handle the rigors of daily use in tough shop environments.

The "bottleneck" shape is a favorite among welders who need to see what they are doing. By tapering down to the 5/8-inch bore, the nozzle blocks less of your view compared to straight nozzles, allowing you to track the joint more accurately. This shape is also a lifesaver when you need to get into a tight corner or a deep V-groove where a bulky nozzle just won't fit. The 5/8-inch ID is the industry standard for general purpose welding, providing a solid column of shielding gas to protect the molten pool from atmospheric contamination without wasting gas.

One of the standout features of this nozzle is the 1/8-inch tip recess. By keeping the contact tip tucked back inside the nozzle, you get an extra layer of protection. If you accidentally touch the work surface or drag the nozzle, the tip stays isolated, preventing burn-backs and arcing to the nozzle itself. This recess also helps shield the tip from radiant heat and spatter, meaning you spend less time changing tips and more time burning wire. The thread-on design is far superior to slip-on friction fits for high-amperage work; it locks the nozzle in place so it won't wobble or fall off when hot, and it ensures the tip stays perfectly centered for a consistent arc.

Compatible strictly with 550A thread-on diffusers, this nozzle is part of a system designed to maximize conductivity and heat dissipation. When you thread it on, you can feel the solid connection that defines the Magnum PRO series. If you are looking to maintain peak performance on your 550A gun and need a nozzle that offers both visibility and protection, the KP3161-1-62R is the correct choice for your setup. It simplifies maintenance and ensures your equipment is ready to perform whenever the arc is struck.