Tweco 1230-1035 Mig Nozzle 3/8 in Bore 450A Copper 2-pack

Product Description

The TWECO 1230-1035 is a 23 Series MIG welding nozzle built for heavy-duty welding applications up to 450 amps. It features a 3/8-inch (0.375 inch) bore and measures 3.219 inches in length with a 3/4-inch OD. The nozzle threads directly onto the conductor tube assembly and is constructed from a copper alloy housing, a solid brass insert, and a silicone insulator in a 3-piece design. The part number is rolled-stamped on the outer surface for fast field identification. Sold in a 2-pack, this nozzle is installed by professional welders and MIG gun technicians working with Tweco No. 3 MIG guns in industrial and fabrication environments.

The 1230-1035 is designed for use with Tweco No. 3 MIG guns rated up to 450 amps. It is suited for medium to heavy-duty MIG welding operations where reliable gas shielding and electrical insulation are required. The nozzle insert is machined with internal threads that match the conductor tube OD threads, allowing a secure threaded connection to the conductor tube assembly. The silicone nozzle insulator provides the electrical insulation needed to separate the nozzle from the gas diffuser. Thread size is 9/16-18 UNC-2B. Recess contact tip relationship is 0.125 to 0.156 inches.

Key Features

• 3/8-inch bore with 3.219-inch length and 3/4-inch OD for heavy-duty MIG applications up to 450A
• 3-piece design: copper alloy housing, solid brass insert, and silicone insulator — no additional insulator required
• Nozzle insert machined to match conductor tube OD threads for a secure threaded fit
• Silicone nozzle insulator provides electrical insulation from the gas diffuser
• Part number rolled-stamped on outer surface for easy identification in the field
• Sold as a 2-pack per unit of measure

Compatibility

Designed for use with Tweco No. 3 MIG guns rated up to 450 amps. The nozzle threads onto the conductor tube assembly on compatible Tweco 23 Series gun configurations.

Installation Notes

Installation and replacement should be performed by a qualified welder or MIG gun technician. Disconnect and de-energize the welding power source before servicing any nozzle or gun components. Thread the nozzle onto the conductor tube assembly by hand first, then verify a secure fit before resuming welding operations. Inspect the silicone insulator for damage during each replacement to ensure proper electrical isolation from the gas diffuser.

Technical Specifications

• Bore Size: 0.375 inches
• Nozzle Length: 3.219 inches
• Outer Diameter: 0.75 inches
• Thread Size: 9/16-18 UNC-2B
• Recess Contact Tip Relationship: 0.125 to 0.156 inches
• Maximum Amperage: 450 amps
• Housing Material: Copper alloy
• Insert Material: Solid brass
• Insulator Material: Silicone
• Package Quantity: 2 per pack
• Weight: 0.2 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1230-1035