KP3161-1-62S-B25 - Lincoln Electric Magnum PRO 550A Bottleneck Gas Nozzle, 1/8 Stickout, 5/8 Bore (25-Pack)

Lincoln Electric KP3161-1-62S-B25 Magnum PRO Nozzle Overview

The Lincoln Electric KP3161-1-62S-B25 is a high-performance gas nozzle engineered for the Magnum PRO series of semi-automatic welding guns. Designed 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 nozzle features a robust copper alloy construction that efficiently dissipates heat from the front end of the welding gun, ensuring longevity and consistent performance even during prolonged welding cycles.

This specific model utilizes a bottleneck geometry with a 5/8-inch (15.9 mm) inner diameter (bore). The bottleneck shape tapers towards the outlet, providing improved access to tight corners and deep V-grooves while maintaining adequate gas shielding coverage. The nozzle is designed to provide a 1/8-inch (3.2 mm) contact tip stickout relative to the nozzle face. This stickout configuration is often preferred for short-circuit transfer modes or applications requiring closer proximity to the weld pool without compromising the nozzle edge.

Mechanically, the KP3161-1-62S-B25 employs a thread-on connection system. Unlike slip-on nozzles, the thread-on design ensures a mechanically positive lock that prevents the nozzle from becoming loose due to thermal expansion and contraction. This secure fit guarantees concentricity with the contact tip and diffuser, optimizing shielding gas flow and preventing turbulence that could lead to porosity. This product is supplied in a bulk package of 25 units, catering to high-volume fabrication environments where consumable inventory management is essential for continuous operation.