KP2742-1-62R - Lincoln Magnum PRO 350A Thread-On Nozzle, 5/8" ID, 1/8" Recess

Lincoln Electric KP2742-1-62R Magnum PRO 350A Nozzle

The Lincoln Electric KP2742-1-62R is a high-performance gas nozzle engineered specifically for the Magnum PRO series of semi-automatic MIG welding guns. Designed to fit both Magnum PRO 250 and Magnum PRO 350 models, this nozzle is an essential component for professional fabricators seeking reliability and precision in their welding operations. The nozzle features a standard 5/8-inch (15.9 mm) inner diameter, which offers a balanced flow of shielding gas suitable for a wide range of wire diameters from .035 inches up to 5/64 inches. This bore size is ideal for general fabrication, providing adequate coverage without excessive gas waste.

One of the critical technical specifications of this nozzle is its 1/8-inch (3.2 mm) recessed tip relationship. A recessed contact tip is preferred in many high-amperage applications as it helps protect the contact tip from the intense heat of the arc and reduces the accumulation of spatter on the tip face. Furthermore, the recess allows for a longer electrical stick-out, which can be advantageous when welding in tight corners or when higher voltage requires a longer arc length. The nozzle connects to the gun via a robust thread-on mechanism. Unlike slip-on nozzles that can become loose or misaligned over time, the threaded connection ensures the nozzle remains concentric with the contact tip, guaranteeing consistent weld quality.

Durability is a hallmark of the Magnum PRO consumable line. The KP2742-1-62R is constructed with high-quality copper alloy and finished with a premium nickel plating. This plating serves a dual purpose: it reflects radiant heat to keep the nozzle and front-end consumables cooler, and it provides a slick surface that resists spatter adhesion. Spatter that does land on the nozzle can be easily removed, reducing downtime for cleaning. The coarse thread design further enhances usability by preventing the nozzle from seizing to the diffuser, ensuring that changeovers are quick and frustration-free even after long welding sessions.