Tweco 1210-1120 Mig Nozzle 5/8 Inch Bore 180A 2-pack

Product Description

The TWECO 1210-1120 is a self-insulated copper MIG welding nozzle designed for use with Tweco No. 1 MIG guns rated up to 180 amps. Built from 122 DHP copper alloy, the nozzle features a 5/8-inch (0.625-inch) bore and measures 2.224 inches in length with a 3/4-inch outer diameter. Its three-piece construction integrates the housing, insert, and insulator into a single assembly, eliminating the need for a separate insulator. The part number is rolled-stamped on the outer surface for fast identification in the field. This item is sold as a pack of 2.

This nozzle is suited for light to medium duty MIG welding applications up to 180 amps. It is a thread-on design that mounts directly onto a standard gas diffuser via M11-1.5-6H threads, making it a practical replacement nozzle for production welding, fabrication shops, and maintenance welding environments. The recessed contact tip relationship of 0.125 inches to 0.156 inches makes it appropriate for higher-heat applications, tack welding, spot welding, and stitch welding where the nozzle may contact the workpiece.

Key Features

• 122 DHP copper alloy housing cut and formed from copper alloy tubing for reliable heat and conductivity performance
• Three-piece design — housing, solid brass insert, and G7 silicone insulator — requires no additional external insulator
• Thread-on mount with M11-1.5-6H threads matches standard gas diffuser thread patterns
• Recessed tip relationship (0.125 inches to 0.156 inches) suited for higher-heat, tack, spot, and stitch welding
• Part number rolled-stamped on exterior for quick identification without referencing packaging
• Sold as a 2-pack for reduced downtime and on-hand availability

Compatibility

Designed for use with Tweco No. 1 MIG guns and standard gas diffusers rated up to 180 amps.

Installation Notes

Installation is performed by welding professionals or qualified maintenance technicians. Always power down the MIG welder and disconnect the gun from the power source before replacing nozzle components. Thread the nozzle onto the gas diffuser by hand until snug — do not overtighten, as this can damage the nozzle insert threads or the diffuser. Inspect the nozzle insulator and insert for spatter buildup or wear during routine front-end maintenance.

Technical Specifications

• Bore Diameter: 0.625 inches
• Nozzle Length: 2.224 inches
• Outer Diameter: 0.75 inches
• Maximum Amperage: 180 A
• Thread Size: M11-1.5-6H
• Tip Recess: 0.125 inches to 0.156 inches
• Housing Material: 122 DHP Copper Alloy
• Insert Material: Solid Brass
• Insulator Material: G7 Silicone
• Package Quantity: 2 per pack
• Weight: 0.13 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1210-1120