997310 - ESAB ST-16/ST-21 MIG Gun Gas Nozzle #12M

Keep Your ST-16 and ST-21 Guns Running Smoothly

Don't let a battered or clogged nozzle compromise your weld quality. The ESAB 997310 Nozzle is the authentic replacement part for the legendary ST-16 and ST-21 MIG guns. Many welders still rely on these durable torches for their daily fabrication needs, and keeping them outfitted with fresh consumables is key to maintaining their performance. Over time, nozzles accumulate spatter, become out-of-round from drops, or suffer from thread damage. A worn nozzle can disrupt shielding gas flow, leading to porosity, erratic arcs, and frustrating rework.

This #12M style nozzle is built to the exact standards you expect from ESAB. Made from tough copper, it stands up to the heat of the arc and resists spatter buildup better than inferior aftermarket copies. A clean, smooth nozzle bore ensures that your shielding gas—whether it's CO2 or an Argon mix—envelops the weld puddle completely. This results in cleaner beads, less oxidation, and a more stable arc. The nozzle is easy to install and remove for routine cleaning or contact tip changes, helping you minimize downtime and keep your production line moving.

Investing in genuine OEM parts like the 997310 ensures that your equipment retains its value and functionality. Whether you are working in an automotive shop, a general fabrication facility, or a home garage, having a spare nozzle on hand is a smart move. It allows you to quickly swap out a damaged part and get back to welding without skipping a beat. Restore the efficiency of your ST-series MIG gun with this high-quality replacement nozzle.

Why Choose Genuine ESAB Nozzles?

• Perfect Fit: No rattling or loose connections; fits ST-16/21 heads perfectly.
• Cleaner Welds: Smooth bore ensures even gas coverage to prevent porosity.
• Longer Life: Quality copper withstands heat and abuse longer than cheap alternatives.
• Easy Maintenance: Smooth surface finish makes spatter removal quick and simple.