Q401-4-50 - ESAB Standard MIG Nozzle 1/2" Bore 1/8" Recess (2-Pack)

Technical Overview

The ESAB Standard MIG Nozzle (SKU: Q401-4-50) is a critical consumable component designed for precision gas metal arc welding (GMAW). Engineered with a 1/2-inch (12.7 mm) bore diameter, this nozzle provides an optimal balance between gas flow velocity and coverage area, making it suitable for a wide range of welding amperages and transfer modes, including short-circuit and globular transfer. The nozzle features a 1/8-inch (3.2 mm) contact tip recess, a specification chosen to protect the contact tip from radiant heat and direct spatter impact while maintaining sufficient electrical stick-out for stable arc characteristics.

Constructed from high-grade copper alloy, the nozzle exhibits superior thermal conductivity, rapidly dissipating heat generated during the welding process. This thermal management is essential for preventing nozzle deformation and reducing the adhesion of molten spatter, thereby maintaining a clear gas path. The internal geometry is machined to promote laminar gas flow, minimizing turbulence that could lead to atmospheric contamination and weld porosity. This product is supplied as a pack of two, ensuring operators have immediate replacements available to minimize downtime in industrial environments.