12601420 - Tweco 26CT-62 MIG Gun Nozzle, 5/8" Bore, Coarse Thread (2-Pack)

Technical Overview of the Tweco 26CT-62 Nozzle

The Tweco 26CT-62 (Stock Code: 1260-1420) is a standard performance gas nozzle designed for the professional fabrication environment. Engineered as part of the widely utilized Tweco 26 Series, this nozzle features a 5/8-inch (0.625" / 15.9 mm) bore orifice, which is the industry standard for general-purpose MIG welding applications. The 5/8" bore strikes an ideal balance between gas flow velocity and coverage area, making it suitable for short-circuit, globular, and spray transfer modes on mild steel.

A defining characteristic of the 26CT-62 is its Coarse Thread (CT) interface. Unlike fine-threaded or slip-on nozzles, the coarse thread design provides a robust mechanical connection to the nozzle insulator (typically the 34CT) while remaining tolerant to thermal expansion and spatter accumulation. This design facilitates rapid removal and installation, essential for high-throughput manufacturing where downtime for torch maintenance must be minimized. The nozzle is machined from a high-conductivity copper alloy, ensuring efficient heat dissipation from the front end of the MIG gun, thereby prolonging the life of the contact tip and diffuser.

This product is supplied as a package of two, ensuring immediate availability of spares. It is fully compatible with Tweco Classic Number 2, 3, and 4 air-cooled MIG guns, as well as the modern Spray Master series (MS250, MS350, MS450). The nozzle geometry is designed to maintain a consistent contact tip-to-nozzle relationship (typically flush or slightly recessed depending on the insulator position), which is critical for maintaining stable arc characteristics and proper stick-out length.