998590 - ESAB 4216 Style MIG Gun Nozzle, 1/2 Inch Bore

ESAB 998590 Replacement MIG Nozzle

The ESAB 4216 Nozzle (Part Number 998590) is a high-quality replacement component designed for compatible MIG welding guns. As a critical part of the front-end consumable set, this nozzle ensures that the shielding gas—whether CO2, Argon, or a mix—is delivered effectively to the weld zone. With a 1/2-inch (12.7 mm) bore diameter, this nozzle is sized for medium-duty to heavy-duty applications where adequate gas coverage is required without sacrificing the ability to see the puddle or access restricted joints.

Manufactured to ESAB's rigorous standards, this nozzle features a robust copper wall thickness that provides durability in industrial environments. The thermal properties of the copper alloy help dissipate the radiant heat generated by the arc, keeping the nozzle cooler and reducing the likelihood of spatter bridging the insulator. This is particularly important during longer weld runs or when operating at higher amperages. The nozzle is designed to seat firmly on the gun's insulator or gas diffuser, ensuring electrical isolation and a leak-free gas seal.

Regular inspection and replacement of MIG nozzles are necessary to maintain weld quality. A nozzle with a deformed orifice or excessive spatter buildup can cause turbulent gas flow, leading to weld defects. The ESAB 998590 offers a reliable solution for maintaining your equipment. It is compatible with specific ESAB and potentially Tweco-style MIG guns that utilize the 4216 series geometry. Fabricators rely on ESAB consumables for their consistency, fit, and performance, ensuring that every arc strike results in a sound weld.

Specifications

• Part Number: 998590
• Bore Size: 1/2 Inch
• Material: Copper Alloy
• Application: MIG (GMAW) / Flux Cored (FCAW-G)
• Compatibility: Fits compatible ESAB/Tweco style MIG guns

Ensure your welding operations run smoothly by keeping a stock of fresh nozzles. The ESAB 4216 1/2-inch nozzle is a cost-effective investment in weld quality, helping you avoid the costly repairs associated with poor gas coverage.