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

Lincoln Electric KP3161-1-62S Magnum PRO 550A Nozzle

The Lincoln Electric KP3161-1-62S is a premium gas nozzle designed specifically for the Magnum PRO 550A series of semi-automatic MIG welding guns. Engineered for high-amperage industrial environments, this nozzle is rated for up to 550 amps, ensuring durability and resistance to heat buildup during extended welding cycles. The component features a thread-on connection mechanism, which provides a secure fit and guarantees precise alignment with the contact tip, reducing the risk of arc instability caused by off-center gas flow.

This specific model features a bottleneck shape, tapering towards the outlet to improve operator visibility of the weld puddle and allow access into tighter joints that standard cylindrical nozzles cannot reach. It offers a 5/8-inch (15.9 mm) bore diameter, which strikes an excellent balance between gas coverage and gas conservation. Additionally, the nozzle is designed to provide a 1/8-inch (3.2 mm) stickout relationship when seated, suitable for applications requiring a specific wire extension for optimal arc control.

Constructed to Lincoln Electric's rigorous standards, the KP3161-1-62S helps maintain the thermal management of the front-end consumables, keeping the welding gun cooler after repeated use. It is an essential replacement part for fabricators using Magnum PRO 550A setups requiring thread-on diffusers.