Pro-source 404-3 Mig Welder Gas Diffuser

Product Description

The PRO-SOURCE 404-3 is a gas diffuser designed for MIG welding guns. It channels shielding gas evenly around the weld pool, protecting the arc from atmospheric contamination and supporting consistent weld quality. Compatible with wire diameters ranging from 0.030 to 0.094 inches, it covers a broad range of common MIG wire sizes used in light fabrication through heavier structural work. The diffuser measures 1.75 inches in length and 0.73 inches in width and height, making it a compact, direct-fit component for MIG torch assemblies. Welding technicians and fabrication professionals install this part as a routine consumable replacement during torch maintenance.

This gas diffuser is suited for MIG welding applications in fabrication shops, maintenance and repair operations, and light industrial environments. It is installed between the contact tip and the welding gun body, where it distributes shielding gas flow and holds the contact tip in position. The 404-3 supports wire diameters from 0.030 to 0.094 inches, accommodating commonly used mild steel, stainless, and flux-core wire gauges across a range of machine setups.

Key Features

• Accepts wire outside diameters from 0.030 to 0.094 inches for broad wire gauge compatibility
• Compact form factor at 1.75 inches long and 0.73 inches in diameter for direct torch fit
• Functions as a consumable replacement to maintain consistent gas coverage and arc stability
• Sold individually as a single-unit package for targeted replacement needs

Compatibility

Designed as a replacement gas diffuser for MIG welding guns that accept wire outside diameters between 0.030 and 0.094 inches. Verify torch brand, model, and contact tip thread specifications before installation to confirm fitment.

Installation Notes

Gas diffusers are installed by qualified welding technicians as part of routine MIG torch consumable maintenance. Before replacing the diffuser, disconnect the welding machine from its power source and allow the torch to cool completely. Use appropriate torch wrench tooling to remove the contact tip and nozzle before accessing the diffuser. Do not overtighten the replacement diffuser, as this can damage the gun body threads or restrict gas flow.