KP2742-2-62S-B25 - Lincoln Magnum PRO 350A Slip-On Nozzle, 1/8 Stickout, 5/8 ID (25-Pack)

Technical Overview of the Lincoln Electric KP2742-2-62S-B25

The Lincoln Electric KP2742-2-62S-B25 is a high-performance gas nozzle designed for the Magnum PRO series of semi-automatic welding guns. Engineered to support amperage ratings up to 350A, this nozzle is an essential component for industrial MIG and flux-cored arc welding applications requiring gas shielding. The unit features a slip-on connection mechanism, which significantly reduces the time required for changeovers compared to threaded alternatives. This design relies on a friction fit over the gas diffuser, ensuring concentricity and stability during operation while allowing for easy removal when cleaning spatter or replacing contact tips.

Dimensionally, this nozzle provides a 5/8 inch (15.9 mm) inner diameter (ID) at the exit orifice. This bore size is optimized for standard gas flow rates used in medium-to-heavy fabrication, providing a laminar column of shielding gas that effectively protects the weld pool from atmospheric contamination. The nozzle geometry creates a 1/8 inch (3.2 mm) contact tip stickout (recess). This specific stickout configuration is critical for maintaining proper electrical stickout (ESO) and arc characteristics, particularly in short-circuit and spray transfer modes where tip placement relative to the nozzle edge influences arc stability and penetration profiles.

Constructed from high-grade copper alloy, the KP2742-2-62S-B25 is built to withstand the thermal stresses of continuous welding. The Magnum PRO platform utilizes a proprietary design that enhances thermal conductivity, drawing heat away from the contact tip and diffuser interface. This thermal management extends the service life of the entire front-end consumable assembly. Supplied in a bulk package of 25 units, this SKU is intended for high-volume manufacturing environments where consumable inventory management and operational efficiency are paramount.