Tweco 1240-1866 Velocity2a Mig Nozzle 5/8 Inch Bore

Product Description

The TWECO 1240-1866 is a Velocity2a medium duty MIG welding nozzle featuring a 5/8-inch bore, designed for semi-automatic MIG welding applications. This nozzle is part of TWECO's Velocity line, engineered to reduce thread-related service issues common with conventional MIG consumables. Standard MIG nozzle assemblies typically involve two or three sets of threads; the Velocity design reduces this to one. The mating thread pairing combines brass on the nozzle with stainless steel on the gooseneck, a soft-against-hard configuration that resists seizing and cross-threading during routine nozzle changes.

This nozzle is suited for medium duty MIG welding in fabrication, maintenance, and repair environments. It installs on compatible TWECO Velocity gooseneck assemblies and is sold individually. The fixed threaded design maintains a consistent flush relationship between the nozzle opening and contact tip, which supports repeatable arc placement and consistent shielding gas coverage. Welders working in production or field settings will find the tool-free nozzle change process reduces downtime during consumable swaps.

Key Features

• Single-thread design eliminates the two or three thread sets found on conventional MIG nozzles, reducing seizing and cross-threading risk
• Brass nozzle threads mate against heat-treated stainless steel gooseneck threads for a soft-on-hard grip that resists loosening
• Fixed threaded configuration maintains consistent flush relationship between nozzle opening and contact tip
• 5/8-inch bore diameter suits medium duty MIG welding applications
• Tool-free nozzle replacement reduces changeover time during welding operations
• Sold individually, allowing targeted replacement of worn consumables

Compatibility

Designed for use with TWECO Velocity series MIG gun gooseneck assemblies that accept the Velocity2a medium duty nozzle interface. Confirm gooseneck compatibility before ordering.

Installation Notes

MIG nozzle replacement is typically performed by a qualified welder or welding technician. Disconnect or power down the welding power source and allow the gun to cool before removing a spent nozzle. Thread the replacement nozzle by hand until snug; the brass-on-stainless thread design does not require tools. Inspect the contact tip and liner condition during any nozzle change interval.

Technical Specifications

• Bore Diameter: 5/8 inch
• Duty Level: Medium Duty
• Length: 3.04 inches
• Width: 1 inch
• Weight: 0.23 pounds
• Sold As: Each
• UPC: 608246434490

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1240-1866