12301300 - Tweco 23T-37 Tapered MIG Nozzle 3/8" Bore (2-Pack)

Reliable Gas Coverage with Tweco 23T-37 Nozzles

The Tweco 23T-37 MIG Nozzle is a standard replacement consumable designed for use with Tweco #2, #3, and #4 series MIG guns. This package contains two high-quality copper alloy nozzles, ensuring you have the necessary backup for your welding operations. The "T" in the part number designates a tapered profile, which narrows towards the outlet. This design choice is critical for welders who need better visibility of the contact tip and the weld puddle, or who frequently weld in corners and tight spaces where a broader nozzle might be obstructive.

With a 3/8-inch (9.5mm) bore, this nozzle provides a focused stream of shielding gas, suitable for short-circuit transfer and lower amperage spray transfer applications. The smaller bore size helps conserve gas while maintaining adequate coverage over the molten pool. These nozzles feature a slip-on connection type, designed to fit securely over the standard 32 or 34 series insulators found on compatible Tweco guns. The slip-on mechanism allows for quick removal and cleaning of spatter, as well as easy replacement without the need for threads that can seize up due to heat and spatter accumulation.

Manufactured to strict tolerances, these nozzles ensure consistent electrical insulation (when used with the proper insulator) and thermal conductivity. The copper construction effectively draws heat away from the front end of the gun, prolonging the life of your consumables and reducing the adhesion of spatter. Whether you are working in automotive repair, light fabrication, or general maintenance, the Tweco 23T-37 offers the reliability and performance expected from industry-standard equipment.