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The ESAB 0157121033 is a Size 5 TIG torch nozzle designed to direct and shape the shielding gas envelope around the tungsten electrode during gas tungsten arc welding (GTAW) operations. With an 8mm (5/16 inch) orifice opening, this nozzle delivers consistent gas coverage on the weld pool, reducing contamination and promoting clean, high-quality welds. Weighing just 0.01 pounds, it is a lightweight consumable intended for regular replacement as part of routine torch maintenance. Licensed welding professionals and certified fabricators performing TIG welding on ferrous and non-ferrous materials rely on correctly sized nozzles to maintain arc stability and shielding integrity.
This nozzle is suited for light to medium TIG welding applications where a Size 5 nozzle is the specified consumable. It is compatible with the 20A torch as well as HW17, HW18, HW26, and HW20 torch bodies, covering a range of commonly used air-cooled and water-cooled TIG torch configurations found in fabrication shops, maintenance facilities, and field welding environments. Sold individually, it is well matched for single-unit replacement needs during scheduled torch servicing.
Confirmed compatible with the following torch models: 20A, Torch HW17, Torch HW18, Torch HW26, and Torch HW20.
Nozzle replacement on TIG torches should be performed by a qualified welder or welding technician with the power source switched off and the torch fully cooled. Hand-tighten the nozzle onto the torch body to avoid cross-threading or cracking; do not use pipe wrenches or excessive force. Verify shielding gas flow rate at the regulator after installation before resuming welding operations. Follow applicable AWS or facility safety standards for torch maintenance procedures.
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