Tweco 1260-1608 Mig Nozzle 5/8 Inch Bore 3.25 Inch 450A

Product Description

The TWECO 1260-1608 is a self-insulated slip-on copper MIG welding nozzle designed for medium to heavy duty welding applications rated up to 450 amps. Built with a 3-piece construction, it consists of a nozzle housing cut and formed from 122 DHP copper alloy tubing, a nozzle insert machined from solid brass and crimped in place, and a nozzle insulator constructed from G7 silicone material. The silicone insulator provides the electrical isolation required between the nozzle and gas diffuser without the need for a separate insulator component. The bore measures 5/8 inch with a 3.25 inch length and 0.875 inch OD. This nozzle is installed by professional welders and MIG welding technicians in fabrication, structural, and industrial settings.

The 1260-1608 is suited for medium to heavy duty MIG welding operations requiring reliable gas coverage and electrical insulation at elevated amperages up to 450A. Its recessed contact tip relationship of 0.125 to 0.156 inches makes it appropriate for higher heat applications where longer electrical stick-out is needed, as well as tack, spot, and stitch welding where the nozzle may contact the workpiece. The slip-on design fits over the metal spring of a standard gas diffuser, making installation and replacement straightforward on compatible MIG torch setups. Sold as a 2-piece pack.

Key Features

• 3-piece design eliminates the need for an additional external insulator
• Nozzle housing formed from 122 DHP copper alloy tubing for durability at high amperages
• Nozzle insert machined from solid brass and crimped in place for secure fit over gas diffuser spring
• G7 silicone nozzle insulator provides electrical isolation from the gas diffuser
• Recessed tip relationship of 0.125 to 0.156 inches suited for high-heat, tack, spot, and stitch applications
• Part number rolled and stamped on external surface for easy field identification
• Rated up to 450 amps for medium and heavy duty welding use

Compatibility

Designed as an OEM-style slip-on replacement nozzle compatible with standard gas diffuser configurations in medium to heavy duty MIG welding torches.

Installation Notes

Installation is performed by qualified welding technicians or MIG torch service personnel. Ensure the welding machine is powered down and the torch is fully de-energized before replacing nozzle components. The slip-on design requires sliding the nozzle over the metal spring on the gas diffuser — no threading is needed. Inspect the gas diffuser and contact tip for wear before reinstalling to avoid premature nozzle failure.

Technical Specifications

• Bore Size: 0.625 inches
• Nozzle Length: 3.25 inches
• Outer Diameter: 0.875 inches
• Recessed Tip Relationship: 0.125 to 0.156 inches
• Current Rating: 450 amps
• Nozzle Housing Material: 122 DHP copper alloy
• Nozzle Insert Material: Solid brass
• Nozzle Insulator Material: G7 silicone
• Attachment Type: Slip-on
• Package Quantity: 2 per pack
• Weight: 0.22 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1260-1608