Tweco 1260-1653 Mig Welding Nozzle 3/4 in Bore 450A

Product Description

The TWECO 1260-1653 is a coarse-threaded copper MIG welding nozzle designed for use with the standard EL gas diffuser. It measures 3.25 inches in length with a 3/4-inch bore and a 0.875-inch outer diameter. Rated for use in medium to heavy-duty welding applications up to 450 amps, this nozzle is constructed from 122 DHP copper alloy tubing and features a recessed contact tip relationship of 0.125 to 0.156 inches. The part number is rolled-stamped on the exterior surface for quick field identification. Sold as a 2-pack.

This nozzle fits welding applications ranging from medium fabrication to heavy industrial work where higher amperage output is required. The recessed contact tip design makes it well suited for high-heat passes, tack welds, spot welds, and stitch welding scenarios where the nozzle may contact the workpiece. It is intended for use on MIG guns equipped with the standard EL series gas diffuser. Licensed welding technicians and certified welders are the primary installers in both shop and field environments.

Key Features

• 3-piece design: nozzle housing, nozzle insert, and nozzle insulator — no additional insulator required
• Housing cut and formed from 122 DHP copper alloy tubing for thermal conductivity and durability
• Nozzle insert machined from solid brass with internal threads matched to the EL gas diffuser
• G7 silicone nozzle insulator provides electrical isolation from the gas diffuser
• Recessed tip contact relationship (0.125 to 0.156 inches) suited for high-heat and contact-nozzle welding
• Part number rolled-stamped on external surface for fast identification in multi-nozzle inventory
• Sold as 2 per pack

Compatibility

Designed for use with the standard TWECO EL series gas diffuser. Threads are matched to the EL gas diffuser interface. Suitable for MIG guns rated for medium to heavy-duty applications up to 450 amps.

Installation Notes

Installation is performed by a qualified welder or welding equipment technician. Always power down the welding machine and allow the gun to cool completely before removing or installing nozzle components. Ensure the gas diffuser threads are clean and undamaged before threading on the nozzle insert to prevent cross-threading. Inspect the silicone insulator for cracking or heat damage at each nozzle change interval.