24CT-62-S - 24CT-62S Replacement MIG Nozzle, 5/8" Bore, Recessed Tip, Tweco Style (2-Pack)

Heavy-Duty 24CT Series Nozzle for High-Amperage MIG Welding

The 24CT-62S is a high-performance MIG nozzle designed to meet the rigorous demands of industrial welding environments. Engineered for compatibility with Tweco No. 4 and equivalent MIG guns (such as the Radnor 400), this nozzle is an essential component for welders operating in the 300 to 450-amp range. The "CT" designation stands for Coarse Thread, a robust thread profile that significantly reduces the risk of seizing and cross-threading, common issues in high-heat environments where thermal expansion and spatter accumulation occur.

Precision Engineering and Material Science
Manufactured from Copper Alloy 145 (Tellurium Copper), this nozzle offers superior thermal properties compared to standard copper nozzles. The alloy facilitates rapid heat dissipation, pulling thermal energy away from the front end of the gun. This not only keeps the nozzle cooler, reducing the adherence of spatter, but also helps maintain the structural integrity of the nozzle orifice over time. Consistent dimensional stability is critical for maintaining laminar gas flow; a deformed nozzle can lead to turbulence, porosity, and poor weld quality.

Optimized Geometry for Process Control
This specific model features a 5/8-inch (16mm) bore, the versatile standard for most structural and fabrication wire diameters (typically .035" to .052"). The 5/32-inch (4mm) recessed tip relationship is a crucial specification for specific welding procedures. A recessed tip allows for a longer electrode extension (stick-out), which increases resistive heating in the wire, potentially increasing deposition rates. It also provides a physical buffer that protects the contact tip from shorting against the workpiece during tight joint access or tack welding. Furthermore, the recess helps shield the contact tip from the intense reflected heat of the arc, reducing the frequency of tip burn-back and fusing.

System Compatibility
This nozzle is part of a two-piece nozzle system, meaning it threads onto a separate insulator (typically part number 34CT). This modular design is superior to single-piece nozzles for heavy-duty applications because it allows the heavy copper housing to be replaced independently of the insulator, reducing long-term consumable costs. It is designed to work seamlessly with 54A gas diffusers and standard Tweco-style contact tips. This 2-pack ensures you have a backup ready, minimizing downtime during critical production runs.