Tweco 1540-1103 Gas Diffuser 450A Mig Welding Copper

Product Description

The TWECO 1540-1103 is a standard-duty copper gas diffuser engineered for MIG welding applications up to 450 amps. Machined from 360-brass and tellurium copper alloy bar stock, this diffuser provides consistent dimensional stability and reliable electrical conductivity under medium to heavy-duty welding conditions. It measures 1.25 inches in overall length and features a 3/8 inch-24UNF-2A thread size with six 0.094-inch gas ports for even shielding gas distribution. The part number is roll-stamped on the external surface for fast field identification. A licensed welding technician or certified MIG operator is the typical installer.

This gas diffuser is designed for use with the Tweco No. 3/4 MIG gun series and is also compatible with Tweco Eliminator front-end consumables. It is suited for medium to heavy-duty welding environments where sustained high-amperage output is required. Applications include structural, fabrication, and industrial MIG welding where consistent gas coverage and tip stability are critical. It is specified for use with 24A series nozzles only and requires a 34A nozzle insulator.

Key Features

• Rated for MIG welding applications up to 450 amps
• Six 0.094-inch gas ports deliver uniform shielding gas coverage around the weld zone
• Machined from tellurium copper alloy bar stock for consistent dimensional stability and electrical performance
• 3/8 inch-24UNF-2A external thread mates with compatible conductor tubes
• Conduit set screw secures the conduit liner in position during operation
• Part number roll-stamped on exterior for quick identification and inventory control
• Sold as a 5-piece pack

Compatibility

Compatible with the Tweco No. 3/4 MIG gun series and Tweco Eliminator front-end consumables. Use with 24A series nozzles only and with the 34A nozzle insulator.

Installation Notes

Installation should be performed by a qualified welder or MIG gun technician. Disconnect and de-energize the welding power source before servicing any front-end consumables. Thread the diffuser onto the conductor tube by hand first to avoid cross-threading, then snug with appropriate tooling. Secure the conduit liner using the integrated set screw before returning the gun to service.

Technical Specifications

• Amperage Rating: 450 amps
• Overall Length: 1.25 inches
• Thread Size: 3/8 inch-24UNF-2A
• Gas Ports: 6 holes at 0.094 inches each
• Material: Tellurium copper alloy bar stock
• Package Quantity: 5 per pack
• Weight: 0.04 pounds
• UPC: 608246243177

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1540-1103