12401220 - Tweco 24A-62 Adjustable MIG Nozzle 5/8" Bore (2-Pack)

Technical Overview of the Tweco 24A-62 Adjustable Nozzle

The Tweco 24A-62 (SKU: 1240-1220) is a standard-duty, adjustable MIG welding nozzle designed specifically for the Tweco Professional Series, including the widely used No. 4 and No. 5 air-cooled MIG guns. This nozzle features a 5/8-inch (15.9 mm) bore orifice, which is the industry standard for medium-to-heavy duty welding applications, providing an optimal balance between gas coverage and accessibility to the weld joint. The "24A" designation indicates it belongs to the 24 Series of adjustable nozzles, characterized by their slip-on fit over the gas diffuser and nozzle insulator.

Constructed from a high-grade copper alloy, the 24A-62 is engineered to withstand the intense radiant heat associated with high-amperage welding (typically in the 400A to 500A range). The nozzle assembly includes a specialized internal insulator that protects the gun's front-end consumables from electrical shorts against the workpiece. The adjustable nature of the nozzle is a critical technical feature; by sliding the nozzle further onto or off the insulator, the operator can precisely control the contact tip stick-out (recess or extension). This adjustment capability is essential for fine-tuning arc characteristics, managing heat input, and adapting to different joint configurations.

This product is supplied as a package of two, ensuring that industrial MRO departments and fabrication shops have immediate replacements available. The 5/8" bore is versatile enough for use with a wide range of wire diameters, typically from 0.035" to 1/16", making it a staple consumable for structural steel fabrication, heavy equipment manufacturing, and general industrial welding. Compatibility extends to any MIG gun setup utilizing the standard Tweco 24-series front-end consumables.