KP23H-62 - Lincoln Magnum 400 Heavy Duty Threaded Gas Nozzle 5/8 Inch ID

Optimize Your Magnum MIG Gun Performance

Achieving high-quality welds requires more than just a good power source; it demands high-quality consumables at the business end of the torch. The Lincoln Electric KP23H-62 is a Fixed Heavy Duty Gas Nozzle designed to deliver superior durability and gas coverage for welders using Magnum® 300 and 400 series MIG guns. As a critical component in the shielding gas delivery system, this nozzle ensures that an inert atmosphere is maintained around the molten weld pool, preventing defects such as oxidation and porosity.

This specific nozzle features a 0.62-inch (5/8 inch) inner diameter, which is the industry standard for medium-to-heavy duty MIG welding. The bore size is optimized to provide a laminar flow of shielding gas—whether you are using CO2 or an Argon blend—ensuring complete coverage of the arc and puddle without creating turbulence that could draw in atmospheric air. The heavy-duty designation indicates a thicker wall construction compared to light-duty nozzles, providing greater resistance to heat deformation and physical abuse in rugged shop environments.

The "Threaded Recess" specification highlights the mounting style and tip positioning. The threaded base allows for quick and secure installation onto the gas diffuser or gun tube, preventing the nozzle from slipping or falling off during overhead or out-of-position welding. The recessed design sets the contact tip back slightly inside the nozzle. This is ideal for protecting the tip from spatter buildup and allows the welder to maintain a consistent contact-tip-to-work distance (CTWD), which is essential for stable arc voltage and wire burn-off rates.

Designed to accommodate a broad range of wire sizes from .025" to 5/64", the KP23H-62 is a versatile addition to any welder's consumable kit. It is compatible with standard Magnum 300 and 400A guns, making it a go-to replacement part for fabrication shops utilizing Lincoln Electric equipment. By maintaining a clean and damage-free nozzle, operators can ensure smoother wire feeding, better arc starts, and cleaner welds with less post-weld cleanup required.