Tweco 1230-1012 Mig Welding Nozzle 5/8 Inch Bore 450A 2 Pack

Product Description

The TWECO 1230-1012 is a Weldskill 23 Series MIG welding nozzle built for medium to heavy duty welding applications up to 450 amps. The nozzle features a 5/8-inch (0.625 inch) bore, a 3.219-inch length, and a 0.875-inch outer diameter. Construction follows a 3-piece design: a nozzle housing cut and formed from copper alloy tubing, a nozzle insert machined from solid brass, and a nozzle insulator constructed of silicone material. The silicone insulator provides the electrical insulation required from the gas diffuser without requiring an additional separate insulator. The part number is rolled and stamped on the outer surface for fast field identification. Sold as 2 per pack.

This nozzle is designed for use with standard gas diffusers on medium to heavy duty MIG welding guns rated up to 450 amps. The 9/16-inch 18 UNC-2B internal thread matches the conductor tube assembly, and the nozzle insert is machined to match conductor tube OD threads. The recessed contact tip relationship measures 0.125 to 0.156 inches. It is suited for professional welding environments where consistent shielding gas coverage and long consumable life are priorities. Licensed welders and fabrication shops handling structural or heavy plate work are the primary end users.

Key Features

• 5/8-inch (0.625 inch) bore size designed for standard gas diffuser compatibility
• 3-piece design: copper alloy housing, solid brass insert, silicone insulator — no additional insulator required
• Rated up to 450 amps for medium to heavy duty welding applications
• Part number rolled and stamped on outer surface for easy identification in the field
• Nozzle threads directly onto the conductor tube assembly via 9/16-inch 18 UNC-2B threads
• Sold as a 2-per-pack quantity

Compatibility

Designed for use with standard gas diffusers on Tweco Weldskill 23 Series MIG welding gun assemblies rated for medium to heavy duty applications up to 450 amps.

Installation Notes

Installation should be performed by a qualified welder or welding equipment technician. Disconnect and de-energize the welding machine before replacing consumables. Thread the nozzle onto the conductor tube assembly by hand until snug, taking care not to cross-thread the UNC-2B internal threads. Inspect the silicone insulator for damage during each consumable change to maintain proper electrical insulation from the gas diffuser.

Technical Specifications

• Bore Size: 0.625 inches
• Nozzle Length: 3.219 inches
• Outer Diameter: 0.875 inches
• Amperage Rating: 450 amps
• Thread Size: 9/16 inch 18 UNC-2B
• Recess Contact Tip Relationship: 0.125 to 0.156 inches
• Nozzle Housing Material: Copper alloy
• Nozzle Insert Material: Solid brass
• Nozzle Insulator Material: Silicone
• Design: 3-piece
• Weight: 0.22 pounds
• Quantity per Pack: 2
• UPC: 608246287782

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1230-1012