Tweco 1250-1410 Mig Welding Nozzle Standard 1/2 Inch Bore

Product Description

The TWECO 1250-1410 is a standard 1/2-inch bore MIG welding nozzle engineered for heavy-duty welding applications in the 25 Series platform. Built as a 3-piece assembly, it combines a nozzle housing cut and formed from 122 DHP copper alloy tubing, a nozzle insert machined from solid brass with internal threads matched to the conductor tube, and a G7 silicone nozzle insulator that provides electrical insulation between components. This design handles current loads up to 500 amperes. The part number is roll-stamped on the outside surface for fast identification in the field. Welding technicians and fabricators working with high-amperage MIG setups will find this nozzle a direct-fit service replacement.

This nozzle is intended for heavy-duty MIG welding applications requiring reliable shielding gas delivery at high amperages. The tapered 3-piece nozzle design eliminates the need for a separate additional insulator, simplifying installation and reducing component count during maintenance. It is suited for industrial fabrication, structural welding, and production environments where continuous high-amperage output is standard. The 1/2-inch bore accommodates common wire diameters used in demanding weld applications.

Key Features

• 3-piece design: 122 DHP copper alloy housing, solid brass insert, and G7 silicone insulator
• Rated for welding applications up to 500 amperes
• Internal threads on brass insert are machined to match the conductor tube for precise fit
• Tapered design does not require an additional external insulator
• Part number roll-stamped on exterior for quick field identification
• Standard 1/2-inch bore for common MIG wire diameter compatibility

Compatibility

Designed as a direct-fit replacement nozzle for TWECO 25 Series MIG welding guns and conductor tubes operating at up to 500 amperes.

Installation Notes

Installation is performed by qualified welding equipment technicians or experienced MIG operators. Disconnect and de-energize the welding power source completely before removing or installing the nozzle. Inspect the conductor tube threads for wear or damage before threading on the new nozzle insert to ensure a secure, gas-tight fit. Do not over-tighten the nozzle assembly, as damage to the brass insert threads may result.

Technical Specifications

• Bore Size: 1/2 inch
• Maximum Amperage: 500 amps
• Nozzle Housing Material: 122 DHP copper alloy
• Nozzle Insert Material: Solid brass
• Insulator Material: G7 silicone
• Length: 2.4 inches
• Width: 1.1 inches
• Height: 1.1 inches
• Weight: 0.17 pounds
• Unit of Measure: Each

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1250-1410