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The PRO-SOURCE 21-50F is a replacement gas nozzle designed for MIG welding guns. The nozzle channels shielding gas around the weld pool to protect the molten metal from atmospheric contamination during the welding process. It accommodates a wire outside diameter range of 0.023 inches minimum to 0.045 inches maximum, making it compatible with common MIG wire sizes used in light fabrication and general repair work. At 0.14 pounds, it is a lightweight component that welding technicians and fabricators replace as part of routine gun maintenance when spatter buildup restricts gas flow or causes arc instability.
This gas nozzle is suited for MIG welding applications in fabrication shops, maintenance and repair operations, and light industrial environments. It fits guns used with both solid wire and flux-core wire setups within the stated wire diameter range. Installers typically stock this nozzle as a consumable replacement part to minimize downtime during active welding operations. The compact form factor, measuring approximately 0.85 inches in height and width and 2.23 inches in length, is consistent with standard short-barrel MIG gun nozzle configurations.
Designed as a replacement MIG welder gas nozzle for guns accepting a wire outside diameter range of 0.023 to 0.045 inches. Confirm gun thread pattern and nozzle bore diameter against your specific gun manufacturer specifications before ordering.
Gas nozzle replacement is performed by welding technicians as part of standard MIG gun consumable service. Always disconnect the welding machine from its power source and allow the gun to cool completely before removing or installing a nozzle. Thread the nozzle carefully by hand to avoid cross-threading, and inspect the contact tip and liner at the same time for wear. Follow the gun manufacturer guidelines and applicable shop safety procedures during service.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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