KP3160-1-50R - Lincoln Magnum PRO 350A Thread-On Nozzle, 1/2" Bore, 1/8" Recess

Optimize Your Magnum PRO 350A with the KP3160-1-50R Bottleneck Nozzle

For professional welders relying on Lincoln Electric's Magnum PRO 350A MIG guns, the KP3160-1-50R Thread-On Nozzle is the standard for reliability and performance. Rated for 350 amps, this nozzle is built to withstand the rigors of high-duty cycle welding while maintaining the cool operation that the Magnum PRO series is known for. The nozzle features a "bottleneck" geometry, tapering down towards the outlet. This design choice is a favorite among fabricators because it significantly improves sight lines to the arc and puddle, allowing for greater precision when navigating complex joints or welding in corners where a bulky straight nozzle might obstruct the view.

The internal specifications of this nozzle include a 1/2-inch (12.7 mm) ID bore and a 1/8-inch (3.2 mm) tip recess. The 1/2-inch bore strikes an excellent balance, providing ample gas coverage for standard wire sizes ranging from .035" to 5/64" without wasting gas. The 1/8-inch recess is a crucial detail for contact tip longevity. By setting the tip back inside the nozzle, it is shielded from the immediate intensity of the arc and reflective heat, and it is less likely to become bridged with spatter during short-circuit transfer. This recess also helps in maintaining the correct contact-tip-to-work distance (CTWD), acting as a physical guide for the welder.

Spatter buildup is the enemy of productivity, and Lincoln Electric addresses this with a high-quality nickel-plated finish. Unlike bare copper nozzles that spatter loves to stick to, the nickel coating provides a slick, hard surface that repels molten droplets. When spatter does accumulate, it flakes off much easier, often with just a tap or a quick brush, keeping your gas flow smooth and turbulent-free. This resistance to spatter adhesion means you spend less time banging your gun against the table and more time laying beads.

Mechanically, the KP3160-1-50R excels with its secure thread-on connection. The coarse threads are engineered to resist seizing, a common frustration with lesser nozzles that get "baked on" after a long shift. The threaded fit also ensures the nozzle stays perfectly centered over the diffuser, eliminating the loose, wobbly feel that can develop with slip-on nozzles over time. This concentricity is vital for consistent gas shielding, preventing porosity caused by off-center airflow. Whether you are welding mild steel, stainless, or flux-cored applications requiring gas, this nozzle provides the durability and precision professional welders demand.