Tweco 1260-1652 Copper Welding Nozzle 5/8 Inch Bore

Product Description

The TWECO 1260-1652 is a coarse-threaded copper MIG welding nozzle designed for use with standard EL gas diffusers. It features a 5/8-inch (0.625-inch) bore and an overall length of 3.25 inches with a 0.875-inch outside diameter. Rated for medium to heavy-duty welding applications up to 450 amps, this nozzle is built from a 3-piece construction: a housing cut and formed from 122 DHP copper alloy tubing, an insert machined from solid brass, and an insulator constructed from G7 silicone material. The part number is roll-stamped on the exterior surface for fast identification in the field. Sold as a pack of 2.

This nozzle threads directly onto a standard EL gas diffuser and is suited for medium to heavy-duty MIG welding environments including fabrication shops, structural steel work, and pipe welding. The recessed contact tip relationship of 0.125 to 0.156 inches makes it well-suited for higher heat applications where longer electrical stick-out is required, as well as tack, spot, and stitch welding scenarios where the nozzle may contact the work piece. Licensed welders and professional fabricators working with wire-feed MIG equipment will find this a direct-fit consumable replacement.

Key Features

• 3-piece design eliminates need for an additional insulator — nozzle housing, insert, and insulator integrated
• Housing cut and formed from 122 DHP copper alloy tubing for durability and conductivity
• Brass insert machined with internal threads to match EL gas diffuser thread pattern
• G7 silicone nozzle insulator provides electrical insulation from the gas diffuser
• Recessed tip geometry supports higher heat and longer stick-out welding applications up to 450A
• Part number roll-stamped on exterior surface for quick identification

Compatibility

Designed to thread onto standard EL gas diffusers. Compatible with medium to heavy-duty MIG welding torches requiring a 5/8-inch bore coarse-threaded nozzle rated up to 450 amps.

Installation Notes

Installation is performed by a qualified welder or MIG torch technician. Always power down and disconnect the welding machine before replacing nozzle consumables. Hand-thread the nozzle onto the EL gas diffuser until snug — do not use tools that could damage the threads or insulator. Inspect the G7 silicone insulator for cracking or spatter buildup during each nozzle change to maintain proper electrical isolation.

Technical Specifications

• Bore Diameter: 0.625 inches
• Outside Diameter: 0.875 inches
• Nozzle Length: 3.25 inches
• Amperage Rating: 450 amps
• Contact Tip Recess: 0.125 to 0.156 inches
• Nozzle Housing Material: 122 DHP copper alloy
• Nozzle Insert Material: Solid brass
• Nozzle Insulator Material: G7 silicone
• Thread Type: Coarse thread, EL gas diffuser compatible
• Package Quantity: 2 per pack
• Weight: 0.22 pounds

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1260-1652