Tweco 1260-1650 Mig Welding Nozzle 3/8 Inch Bore 450A

Product Description

The TWECO 1260-1650 is a coarse-threaded copper MIG welding nozzle designed for medium to heavy duty welding applications rated up to 450 amps. It features a 3/8 inch (0.375 inch) bore, an outside diameter of 0.875 inches, and a total length of 3.25 inches. The nozzle uses a 3-piece construction consisting of a housing cut and formed from 122 DHP copper alloy tubing, an insert machined from solid brass with internal threads matched to the gas diffuser, and an insulator constructed from G7 silicone material. The part number is rolled and stamped on the exterior surface for easy field identification. Sold as a 2-piece pack.

This nozzle threads directly onto a standard EL gas diffuser and is suited for recessed contact tip configurations, with a recess relationship of 0.125 to 0.156 inches. Recessed tip setups are commonly used in higher heat applications where longer electrical stick-out is required, or in situations where the nozzle may contact the workpiece during tack, spot, or stitch welding. The nozzle is appropriate for MIG welding rigs used in fabrication shops, structural welding, and other industrial environments where sustained high-amperage output is expected.

Key Features

• Rated up to 450 amps for medium to heavy duty MIG welding
• 3/8 inch bore with 0.875 inch OD and 3.25 inch length
• 3-piece design eliminates the need for an additional insulator
• Housing formed from 122 DHP copper alloy tubing for conductivity and durability
• Brass insert with machined internal threads to match standard EL gas diffuser
• G7 silicone nozzle insulator provides electrical isolation from the gas diffuser
• Part number rolled and stamped on exterior for quick identification
• Sold as 2 per pack

Compatibility

Designed to thread onto standard EL gas diffusers. Compatible with medium to heavy duty MIG welding setups requiring a coarse-threaded copper nozzle with a 3/8 inch bore.

Installation Notes

Installation should be performed by a qualified welding technician with the welding machine powered off and fully de-energized before servicing front-end consumables. Thread the nozzle onto the EL gas diffuser by hand until snug, taking care not to cross-thread the brass insert. Inspect the silicone insulator for damage or wear during each nozzle change, as a compromised insulator can allow unwanted electrical contact with the gas diffuser.

Technical Specifications

• Bore Size: 0.375 inches
• Outside Diameter: 0.875 inches
• Nozzle Length: 3.25 inches
• Amperage Rating: 450 amps
• Contact Tip Recess: 0.125 to 0.156 inches
• Thread Type: Coarse thread
• Housing Material: 122 DHP copper alloy
• Insert Material: Solid brass
• Insulator Material: G7 silicone
• Package Quantity: 2 per pack
• Weight: 0.21 pounds
• UPC: 608246136424

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1260-1650