Tweco 1230-530 Mig Nozzle Flat Arc Spot 3/4 Inch Bore 450A

Product Description

The TWECO 1230-530 is a flat arc spot MIG welding nozzle engineered for use with Tweco No. 3 MIG guns rated up to 450 amps. The nozzle features a 3/4-inch bore and measures 3.219 inches in length. It threads directly into the conductor tube assembly via a 9/16-18 UNC-2B thread and maintains a recessed contact tip relationship of 0.125 to 0.156 inches. Built from a copper alloy housing with a solid brass insert and a silicone nozzle insulator, this is a purpose-built component for demanding, high-amperage MIG welding operations. The part number is rolled and stamped on the outer surface for quick field identification. Sold as a 2-pack.

This nozzle is suited for heavy-duty MIG welding applications in fabrication, manufacturing, and structural welding environments. The flat arc spot design makes it appropriate for spot welding configurations. It is installed by professional welding technicians and MIG gun service personnel working with Tweco No. 3 gun assemblies in applications requiring sustained output up to 450 amps.

Key Features

• Flat arc spot nozzle design for spot welding applications
• 3/4-inch bore with 9/16-18 UNC-2B thread, strings directly into the conductor tube assembly
• 3-piece construction: 122 DHP copper alloy housing, solid brass machined insert, and G7 silicone insulator
• Nozzle insert is internally threaded to match conductor tube OD threads, no additional insulator required
• G7 silicone nozzle insulator provides electrical insulation from the gas diffuser
• Part number rolled and stamped on outer surface for easy identification in the field

Compatibility

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

Installation Notes

Installation is performed by qualified welding technicians or MIG gun service personnel. Disconnect and de-energize the welding power source completely before servicing the gun or replacing nozzle components. Thread the nozzle into the conductor tube assembly by hand first to confirm proper thread engagement before final tightening. Inspect the silicone insulator and brass insert for wear or damage each time the nozzle is replaced.

Technical Specifications

• Nozzle Type: Flat Arc Spot
• Bore Size: 3/4 inch
• Nozzle Length: 3.219 inches
• Thread Size: 9/16-18 UNC-2B
• Contact Tip Relationship (Recess): 0.125 to 0.156 inches
• Maximum Amperage: 450 A
• Housing Material: 122 DHP copper alloy
• Insert Material: Solid brass
• Insulator Material: G7 silicone
• Package Quantity: 2 per pack
• Weight: 0.24 pounds
• Height: 3.6 inches
• Width: 0.9 inches
• Length: 0.9 inches

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1230-530