15401127 - Tweco 54-16 Gas Diffuser for No. 3 & 4 MIG Guns (5-Pack)

Reliable Performance for Your MIG Gun

When you are in the middle of a long weld, the last thing you need is a front-end failure. The Tweco 54-16 Gas Diffuser is the industry standard for a reason—it works. Designed to fit your trusty Tweco No. 3 or No. 4 MIG gun, this diffuser does the heavy lifting of transferring current to your wire while smoothing out your shielding gas flow. A worn-out diffuser can cause erratic arcs, poor gas coverage, and frustrating thread issues when you try to change tips. Swapping in a fresh 54-16 ensures your gun runs like new.

These diffusers are machined from solid brass, making them tough enough to handle the heat of 300 to 400 amp welding applications. They are designed to hold 14 Series contact tips securely, preventing the loosening that can cause burn-back or voltage drops. If you use slip-on nozzles (24 Series), this is the part you need to keep everything tight and aligned. Whether you are fabricating structural steel or doing general repairs, having a pack of these in your toolbox means you are always ready to fix a problem and get back under the hood.

This package contains 5 gas diffusers, giving you plenty of spares for the shop. Don't let a clogged or stripped diffuser slow down your production. Upgrade to genuine Tweco-style reliability and keep your welds clean and your arc stable.