21-62 - Tweco Style 21-62 MIG Gun Nozzle, 5/8-Inch Bore, Recessed Tip (2-Pack)

Premium Tweco Style 21-62 MIG Nozzle Replacement

The Tweco Style 21-62 MIG Nozzle is a precision-engineered consumable designed to meet the rigorous demands of light to medium-duty industrial welding. Manufactured to exact specifications, this nozzle serves as a direct replacement for the OEM Tweco 21-62 (Part No. 1210-1120) and is fully compatible with Tweco No. 1 Series MIG guns as well as the widely used Lincoln Magnum 100L welding guns found on many compact MIG machines. This product is supplied in a convenient package of two, ensuring operators have a backup on hand to minimize downtime.

Technically, the nozzle features a robust 3-piece design that integrates a nozzle housing, a nozzle insert, and a nozzle insulator into a single, cohesive unit. The housing is cut and formed from high-grade 122 DHP copper alloy tubing, chosen for its superior thermal conductivity and resistance to spatter adhesion. The internal insert is machined from a solid brass alloy, providing durable threads that resist seizing even after repeated thermal cycling. This brass insert screws directly onto the standard 35-50 gas diffuser, ensuring a gas-tight seal and concentric alignment.

Crucial to its performance is the integrated G7 silicone insulator. This component provides the necessary electrical insulation between the electrically live gas diffuser and the outer copper housing, preventing arc-out against the workpiece. The nozzle features a 5/8-inch (16mm) bore, which is the industry standard for general fabrication, offering an ideal balance of gas flow velocity and coverage area. The tip relationship is recessed, meaning the contact tip sits slightly back inside the nozzle, offering protection against short circuits and reducing the accumulation of spatter on the tip face. Rated for applications up to 180 amperes, this nozzle is an essential component for maintaining arc stability and weld quality in production environments.