Tweco 1230-1112 Mig Nozzle 1/2 in Bore 450A 23 Series

Product Description

The TWECO 1230-1112 is a 23 Series self-insulated MIG welding nozzle built for heavy-duty applications up to 450 amps. It features a 1/2 inch bore, a 3.11 inch length, and a 0.875 inch OD. The thread size is 9/16 inch-18 UNC-2B, and the flush contact tip relationship is 0.062 inches, making it suited for applications requiring longer electrical stick-out. This nozzle strings into the conductor tube assembly and is designed for use with standard gas diffusers. Sold in packs of 2, the part number is rolled-stamped on the outer surface for quick field identification.

This nozzle is intended for heavy-duty MIG welding environments where sustained high-amperage output is required. The flush tip configuration brings the contact tip closer to the work piece and is typically selected for applications with shorter or tighter arc lengths. It is well suited for industrial fabrication, structural welding, and other demanding applications where the gun assembly sees sustained high-cycle use. Licensed welders and welding technicians are the primary installers and users of this consumable.

Key Features

• 3-piece design: nozzle housing, nozzle insert, and nozzle insulator — no additional insulator required
• Nozzle housing cut and formed from 122 DHP copper alloy tubing for high thermal conductivity
• Nozzle insert machined from solid brass with internal threads machined to match conductor tube OD threads
• Nozzle insulator constructed of G7 silicone material for electrical insulation from the gas diffuser
• Part number rolled-stamped on outer surface for easy identification during inventory and replacement
• Rated for heavy-duty welding up to 450 amps

Compatibility

Designed for use with standard gas diffusers and conductor tube assemblies in the TWECO 23 Series MIG gun platform. Nozzle strings into the conductor tube assembly using a 9/16 inch-18 UNC-2B thread interface.

Installation Notes

Installation and replacement of MIG welding nozzles should be performed by a qualified welding technician with the welding machine powered down and the gun assembly cooled before servicing. Ensure the conductor tube threads are clean and free of spatter before threading on the replacement nozzle. Do not overtighten — hand-thread until snug to avoid damage to the brass insert threads. Follow all applicable AWS safety guidelines and facility hot-work procedures when servicing welding equipment.

Technical Specifications

• Bore Size: 1/2 inch
• Nozzle Length: 3.11 inches
• Outer Diameter: 0.875 inches
• Thread Size: 9/16 inch-18 UNC-2B
• Flush Contact Tip Relationship: 0.062 inches
• Amperage Rating: 450 amps
• Nozzle Housing Material: 122 DHP copper alloy
• Nozzle Insert Material: Solid brass
• Nozzle Insulator Material: G7 silicone
• Package Quantity: 2 per pack
• Weight: 0.21 pounds
• UPC: 608246056579

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1230-1112