Tweco 1250-1440 Mig Nozzle 5/8 Inch Bore 25 Series

Product Description

The TWECO 1250-1440 is a 3-piece MIG welding nozzle designed for the Tweco 25 Series (25CT) gun platform. It features a 5/8-inch bore and a 2.2-inch length, making it suited for medium to heavy-duty MIG welding operations up to 550 amps. The nozzle housing is cut and formed from 122 DHP copper alloy tubing. The insert is machined from solid brass with internal threads matched to the conductor tube. A G7 silicone insulator provides the required electrical isolation. Licensed welders and fabrication shops rely on this nozzle for consistent shielding gas coverage in demanding weld environments.

This nozzle fits the Tweco 25 Series MIG gun and is rated for medium and heavy-duty welding applications up to 550 amps. The tapered 3-piece design eliminates the need for a separate external insulator, reducing parts count during consumable changes. It is well suited for production welding environments, structural fabrication, and heavy manufacturing where higher amperage output and reliable gas coverage are required. The part number is rolled and stamped on the outside surface for quick identification during consumable inventory management.

Key Features

• Nozzle housing cut and formed from 122 DHP copper alloy tubing for heat resistance and conductivity
• Insert machined from solid brass with internal threads matched to the conductor tube
• G7 silicone nozzle insulator provides electrical insulation without a separate external insulator
• Tapered 3-piece design rated for welding applications up to 550 amps
• Part number rolled and stamped on outside surface for easy field identification
• 5/8-inch bore diameter with 2.2-inch overall nozzle length

Compatibility

Designed for use with Tweco 25 Series (25CT) MIG welding guns in medium and heavy-duty welding applications up to 550 amps.

Installation Notes

Installation and consumable replacement should be performed by a qualified welder or welding technician with the machine powered down and the gun cooled before handling. Thread the nozzle insert onto the conductor tube by hand until snug, then seat the nozzle housing and insulator according to the gun manufacturer's assembly sequence. Inspect the G7 silicone insulator for cracking or carbon buildup at each consumable change, as damaged insulation can cause arc faults or irregular shielding gas flow.

Technical Specifications

• Bore Diameter: 5/8 inch
• Nozzle Length: 2.2 inches
• Maximum Amperage Rating: 550 amps
• Nozzle Housing Material: 122 DHP Copper Alloy
• Insert Material: Solid Brass
• Insulator Material: G7 Silicone
• Weight: 0.18 pounds
• Width: 2.4 inches
• Unit of Measure: Each

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1250-1440