Tweco 1230-1011 Mig Welding Nozzle 1/2 Inch Bore 450A

Product Description

The TWECO 1230-1011 is a Weldskill 23 Series MIG welding nozzle built for standard gas diffuser setups in medium to heavy duty welding applications rated up to 450 amps. The nozzle features a 1/2 inch bore, measures 3.219 inches in length, and has 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 from G7 silicone material. The part number is rolled and stamped on the outer surface for quick field identification. This nozzle is installed by certified welding professionals and MIG technicians maintaining gun consumable components. Sold as 2 per pack.

The TWECO 1230-1011 is suited for medium to heavy duty MIG welding environments where reliable shielding gas coverage and consistent arc performance are required. The 9/16 inch-18 UNC-2B thread size allows the nozzle to thread directly onto the conductor tube assembly. The nozzle insert is crimped in place, enabling the nozzle to slide over the metal spring that is part of the gas diffuser. The recess contact tip relationship of 0.125 to 0.156 inches supports proper arc geometry for applications running up to 450 A. The G7 silicone insulator provides the electrical isolation needed between the nozzle and the gas diffuser without requiring an additional separate insulator component.

Key Features

• 3-piece design includes copper alloy nozzle housing, solid brass nozzle insert, and G7 silicone nozzle insulator
• Rated for welding applications up to 450 amps
• 1/2 inch bore with 0.875 inch outer diameter for consistent shielding gas flow
• 9/16 inch-18 UNC-2B thread size threads directly onto conductor tube assembly
• Nozzle insert machined from solid brass and crimped in place for secure fitment over gas diffuser spring
• Part number rolled and stamped on outer surface for easy identification in the field
• Sold as 2 per pack

Compatibility

Designed as a replacement nozzle for TWECO Weldskill 23 Series MIG welding guns using standard gas diffuser assemblies. Compatible with conductor tube assemblies using a 9/16 inch-18 UNC-2B thread and a matching OD thread profile.

Installation Notes

This nozzle is installed by qualified welding equipment technicians or experienced MIG welders performing gun consumable maintenance. Always power down and disconnect the welding machine before replacing nozzle components. Thread the nozzle onto the conductor tube assembly by hand to avoid cross-threading, then snug firmly without over-torquing. Inspect the gas diffuser and contact tip condition at the same time to ensure full system performance after reinstallation.

Technical Specifications

• Bore Size: 1/2 inch
• Nozzle Length: 3.219 inches
• Outer Diameter: 0.875 inches
• Thread Size: 9/16 inch-18 UNC-2B
• Recess Contact Tip Relationship: 0.125 to 0.156 inches
• Current Rating: 450 amps
• Nozzle Housing Material: Copper alloy
• Nozzle Insert Material: Solid brass
• Nozzle Insulator Material: G7 silicone
• Package Quantity: 2 per pack
• Weight: 0.22 pounds
• UPC: 608246287768

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1230-1011