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The PRO-SOURCE 34A is an adjustable nozzle insulator designed for MIG welding applications. It mounts between the contact tip holder and the gas nozzle on a MIG welding gun, providing electrical insulation and helping to position the nozzle for consistent shielding gas coverage. The part supports wire outside diameters from 0.023 inches up to 0.094 inches, making it compatible with a range of common MIG wire sizes. At 0.022 pounds, it is a lightweight consumable replacement that welding technicians and fabricators keep on hand for routine gun maintenance.
This nozzle insulator is used in MIG welding setups where the insulator between the diffuser and the nozzle has worn, cracked, or been damaged by heat and spatter. Adjustable design allows for minor positional tuning of the nozzle relative to the contact tip. Sold as a single unit, it suits shops and field service technicians who need a direct replacement to restore proper shielding gas flow and tip protection on a MIG gun.
Designed as an OEM-style replacement nozzle insulator for MIG welding guns accepting adjustable-style insulators within the supported wire diameter range.
Installation is typically performed by a welding technician or qualified fabricator during routine MIG gun maintenance. Always disconnect the welding gun from the power source and allow the gun to cool fully before handling consumable components. Remove the existing nozzle and contact tip assembly before replacing the insulator, and verify the replacement seats properly before reassembling the gun and resuming operation.
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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