12201305 - Tweco 22-37 Heavy Duty MIG Nozzle 3/8-Inch Bore (2-Pack)

Technical Overview of the Tweco 22-37 Heavy Duty Nozzle

The Tweco 22-37 (SKU: 1220-1305) is a heavy-duty MIG welding nozzle designed for professional industrial applications. Part of the widely utilized Tweco 22 Series, this nozzle features a 3/8-inch (9.5 mm) bore diameter, making it specifically suitable for applications requiring a narrower gas cone or access to restricted joints. The nozzle is manufactured from a high-quality copper alloy, engineered to withstand the high thermal loads associated with medium to heavy-duty welding cycles.

This component utilizes an adjustable slip-on connection mechanism. It is designed to fit over standard Tweco 32 and 34 series nozzle insulators, which are commonly found on Tweco Professional No. 2, No. 3, and No. 4 air-cooled MIG guns. The slip-on design provides the operator with the ability to adjust the nozzle position relative to the contact tip, thereby modifying the tip recess or stick-out to suit specific welding procedure specifications (WPS). This adjustability is critical for managing gas coverage and arc characteristics in varying joint configurations.

The "Heavy Duty" designation indicates a robust wall thickness compared to standard duty nozzles, providing greater resistance to spatter adhesion and deformation from heat. The 3/8-inch bore is the smallest in the standard 22 Series range (compared to 1/2" or 5/8"), concentrating the shielding gas flow which can be advantageous when welding at lower amperages or in drafty conditions where a stiffer gas column is required. This package contains two (2) nozzles, ensuring immediate availability of spares for production continuity.