Tweco 1230-1230 Welding Nozzle 3/4 Inch Bore 450A

Product Description

The TWECO 1230-1230 is a 23 Series self-insulated MIG welding nozzle designed for use with standard gas diffusers on heavy-duty welding applications rated up to 450 amps. The nozzle threads directly onto the conductor tube assembly, eliminating the need for a separate insulator. It features a 3/4 inch bore and a 9/16 inch-18 UNC-2B thread size, making it suitable for applications that require longer electrical stick-out or where the nozzle may contact the workpiece. Constructed from 122 DHP copper alloy, this nozzle delivers reliable conductivity and durability under sustained high-amperage welding conditions. Sold in a 2-pack.

This nozzle is built for heavy-duty MIG welding environments where sustained amperages up to 450 A are common, such as structural fabrication, heavy equipment repair, and industrial manufacturing. The self-insulated design suits applications where the nozzle threads into the conductor tube and electrical isolation from the gas diffuser is handled internally by the nozzle insulator. It is a standard fitment for TWECO 23 Series gun assemblies used by professional welding technicians in shop and field settings.

Key Features

• Rated for heavy-duty welding applications up to 450 amps
• 3-piece design: copper alloy nozzle housing, solid brass nozzle insert, and silicone nozzle insulator
• Self-insulated construction eliminates the need for an additional separate insulator
• Nozzle insert machined from solid brass with internal threads matched to conductor tube OD threads
• Nozzle housing cut and formed from 122 DHP copper alloy tubing for high conductivity
• Part number roll-stamped on the outer surface for quick field identification
• 9/16 inch-18 UNC-2B thread size for extended electrical stick-out or contact-tip-to-work applications

Compatibility

Designed for use with TWECO 23 Series standard gas diffusers and conductor tube assemblies where the nozzle threads directly onto the conductor tube.

Installation Notes

Installation is performed by qualified welding technicians. Disconnect and de-energize the welding power source before replacing any gun consumables. Thread the nozzle onto the conductor tube assembly by hand until snug, taking care not to cross-thread the UNC-2B threads. Inspect the nozzle insulator for cracking or spatter buildup during routine maintenance and replace the nozzle as a unit when wear affects arc performance.

Technical Specifications

• Bore Size: 3/4 inch
• Thread Size: 9/16 inch-18 UNC-2B
• Maximum Amperage: 450 A
• Nozzle Housing Material: 122 DHP copper alloy
• Nozzle Insert Material: Solid brass
• Nozzle Insulator Material: Silicone
• Design: 3-piece self-insulated
• Package Quantity: 2 per pack
• Weight: 0.36 pounds
• Length: 3.2 inches
• UPC: 608246056791

Standard Information

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